5. Mobile application

1. Buy a CR2032 coin cell battery for the head sensor.

2. Download ACT Head Impact Tracker smartphone mobile App from Google Play on your smartphone. Please notice that App is for Android 9 or newer Android operating system only, and that the App’s compatibility with all and every smartphone brand and model has not been tested and cannot be guaranteed. Updated list of brands and models tested can be found in FAQ in www.act-tracker.com

3. Create User Account in the App. Your email acts as your User-ID. Make sure to store your password somewhere safe.

4. Create Profile in your User Account to which you want to add the head sensor to. Follow App’s instructions on creating Profile. Please note: You cannot remove or change Profile once created.

5. Ensure location services and Bluetooth® wireless communication are enabled, on and active in your smartphone for the App and always when using it with the head sensor. Ensure also that your mobile data and roaming (if needed) are enabled, on and active in your mobile device for the App and always when using it with the head sensor, or that you are connected to Wi-Fi. If you do not have mobile data or Wi-Fi at your disposal, please use the sensors in Tracker mode, it will decrease their power consumption. Note: when sensors are on Tracker mode, near-real-time delivery of sensor measurements is not functional, you have to download the impacts from the sensor to the App after the session, when mobile device can be connected to mobile data or Wi-Fi.

6. Remove the head sensor from its package. Open the hatch. Add the coin cell battery by carefully sliding it underneath the silver-colored holder bridge as indicated by the arrow on the bridge + side is facing you and away from the electronics.

7. Locate the head sensor’s Serial number also acting as Registration code, which is on the product label underneath the battery hatch. Open the hatch and you can see the white sticker on the lid. Registration code is a 6-digit code on the product label.

8. Close the hatch by pressing all the sides firmly together to seal the locks on them. Check that the sides are seamlessly connected with each other before the use. Please note: Inserting the battery may turn the sensor on, but some components might not turn on. Before the use, switch the sensor off and back on.

9. Turn the head sensor on by pressing the on/off-button once slowly and firmly. The sensor is on when the small red led light next to the button starts to blink in slow frequency.  If the led-light blinks in high frequency (in fast pace), the battery is almost empty. Change the battery or ACT Head Impact Tracker might not work as intended. If the light does not come on at all, or the light comes on but it is not blinking, try with a new battery. If the light still is not coming on at all, or the light comes on, but it is not blinking, the head sensor is not working as it is supposed to and should be replaced.

10. When the sensor is on, choose Profile you want to add the sensor to, click on it. Click then the green button next to “Sensors”, and then “Add Sensor” button.

The App has found the sensor when it says on it: “Found 1 sensor”. Click “Continue”.

The App is connected to the sensor when it shows “Connected to 1/1 sensors”. Add Registration code to the line under the text. Click “Continue”. If the App can not find any sensor, switch the sensor off and back on, and try again. If the App finds more than one sensors, switch off all the other sensors than the one you want to register and try again.

11. Choose the sport / discipline the sensor is primarily used for > Click “Continue”

12. Optional: name your sensor and/or just click “Finish”. the App will confirm “Registration is successful”. This means your ACT Head Impact Tracker is ready for action.

In the end of each session of use, make sure to switch off the sensor by pressing on/off-button slowly and firmly twice. Wait for three short led-light blinks to indicate the sensor is switched off. Doing this will prevent impacts from handling and transportation to be recorded to your impact history. Also, it will save energy and prolong your battery lifetime.

See detailed illustrated instructions in User Manual.

Last updated: 19th of December 2022

LIST OF MOBILE DEVICES’ FUNCTIONALITY WITH ACT HEAD IMPACT TRACKER

Tested and found working brands (models, Android OS)
1. Samsung Galaxy A21s (AOS 12)
2. Samsung Galaxy A41 (AOS 11)
3. Samsung 9+ (AOS 10)
4. Samsung A40 (AOS 11)
5. Samsung S21 Ultra 5G (A13)
6. Motorola e20 (AOS 11)
7. OnePlus8 (AOS12)
Please note: occasional problems with establishing and maintaining connection between the head sensors and mobile devices (no notification to the App regarding) were recorded:
Samsung phones: a.) in some models Bluetooth® wireless connection was slow or even disconnected if the mobile phone’s screen is switched off (= not lighted). The connection should be re-established and information from the sensors delivered when the screen is switched back on (=lighted) – if the sensor(s) are in the reach of Bluetooth® wireless technology. b.) In all models pop-up window with list of devices for paring appears when Bluetooth® wireless technology is switched on. When this happens, just click “Continue” to close the window. No paring is needed, nor appearing nor choosing it on the list.

Tested and found not working as intended (models, Android OS)
8. Xiaomi Redmi 9a (AOS 10)
Frequent problems with establishing and maintaining connection between the head sensors and mobile devices (no notification to the App regarding) were recorded:
The connection between the sensors and the mobile phone was disconnected when the App was not on, on top of the open Apps and/or screen was switched off (not lighted).

Tested and found not working (models, Android OS)
9. OnePlus Nord N100 (AOS 11)
10. OnePlus8 (AOS13)
ACT Head Impact Tracker does not function with these mobile devices.

Other brands and models have not been tested, and cannot be granted to work, or work as intended with ACT Head Impact Tracker. (If your device is not on the list, it does not guarantee it is functional, or that is not. We just have not tested it yet.)

When an impact occurs the head sensor is trying to send the impact information via Bluetooth® wireless connection to the mobile smartphone with ACT Head Impact Tracker App. If the mobile device and App are not at Bluetooth® wireless connection reach, the head sensor saves the impact data in it. The saved impact information can be transmitted when the sensor is at Bluetooth® wireless connection reach and multiple impact information can be transferred on one go.

To use ACT Head Impact Tracker you need to have User Account. This is how your can create one.

1. Go to Google Play store and download ACT Head Impact Tracker Application to your compatible Android smartphone.
2. Choose “Register” on the opening page > Click “continue”
3. Type in your email address to act as your UserID. Ensure there is no autofillings/autocorrections which should not be there to your email address. Please notice, you can not change your UserID once created. > Click “continue”
4. Create a password with minimum 9 characters to it containing small and capital letters and numbers to it. > Click “continue”
5. Retype your password > Click “continue”.
6. Select the country you live in > Click “continue”
7. Read carefully our “Privacy policy “ > > scroll to the end of the document > Add a tic to the box > Click “ok”
8. Read carefully our “Terms of Service” > scroll to the end of the document > Add a tic to the box > Click “ok”

You have created User Account and can add Profile(s) to it.

To add ACT Head Impact Tracker sensor to your User Account, you have to create Profile. Please notice: you cannot change the information on the Profile, nor remove Profile once created.

1. Click ”Add profile” on App’s landing page.
2. Give name to Profile. For data security reasons, we recommend not to use real or full names on Profiles. > Click “continue”
3. Give a birthday to Profile. For data security reasons we suggest only to use actual birth month and year, which our company needs to fulfill our legal obligations > Click “finish”.
4. Choose your gender > Click “finish”
   You have created Profile to User Account and can add sensor(s) to it.

To add and use ACT Head Impact Tracker sensor, you have to add it to Profile on your User Account. Note: you cannot change Sensor information, nor move or remove Sensor once added to Profile.

1. Click on Profile you wish add sensor to on App’s landing page.
2. Click on green bullet with +-sign on it on “Sensors” block > Click “Add sensor” so that ”Activate the sensor page opens.
3. Insert battery to the sensor, switch it of and back on > Click ”Continue” > Wait for ”Found 1 sensors” text to appear. > Click ”Continue” > Wait for ”Connected to 1/1 sensors” appear > Type the 6-number serial number also acting as registration code to the line > Click ”Continue” If the App can not find any sensor, switch the sensor off and back on, and try again. If the App finds more than one sensors, switch off all the other sensors than the one you want to register and try again.
4. Choose the sport / discipline the sensor is primarily used for > Click “Continue”
5. Optional: name your sensor or just click “Finish”
6. Wait for “Configuring the sensor” to be completed before switching off the sensor or App.
7. Adding sensor is completed and you can switch off the sensor and the App once App confirms “Sensor registered successfully” and you can see it in “Sensors” on Profile.
   You are now all set and good to go. Sport safely!

Due to differences in smartphone brands and models, their operating systems and updates to them, it is recommended to have ACT Head Impact Tracker smartphone mobile App, logged in, open and screen switched on always when using the head sensor(s) and you wish to get the impact information near-real-time.
Unsent impact information will be saved to the sensor and you can retrieve it once the Bluetooth® wireless connection in the mobile phone is available and the mobile device is connected to Wi-Fi our mobile data.

The App is currently available only in Google Play store and smart phones running Android operating system only. The functionality with all smartphone brands and models has not been tested and cannot be granted. There are brands and models which are not working as intended, or not working at all with ACT Head Impact Tracker. Please ensure to check the list of tested brands and models ”What smartphone devices are compatible with ACT Head Impact Tracker?” before purchasing ACT Head Impact Tracker head sensor or accessories.
Changes and updates in mobile phone brands, models, operating systems and components, as well as changes and updates made to features, functionalities and user preferences may impact on ACT Head Impact Tracker system and functionality. We are working hard to keep our App updated and functional with as many devices as possible, please help us to do so and tell us on the problems you encounter by emailing us at

Sorry, but you can’t. Not yet. The App is not available for iPhones or iOS yet.

Currently, yes. However the functionality with all smartphone brands and models has not been tested and cannot be granted. There are brands and models which are not working as intended, or not working at all with ACT Head Impact Tracker. Please ensure to check the list of tested smartphone brands and models in ”What smartphone devices are compatible with ACT Head Impact Tracker?” before purchasing ACT Head Impact Tracker head sensor or accessories.

Unfortunately the phone operating systems are frequently updated and sometimes those updates might have dramatic impacts on the applications. All the brands have their own version of Android operating system, even if they are called the same number, every brand has their own version of that number, so to speak.
We are doing our best to keep up with the development and changes made, but it is essential to understand that sometimes we only learn about the affects once the release is out. And sometimes the changes are affecting too much and ACT Head Impact Tracker system will become dysfunctional. Hence it is not impossible that one day a certain model with certain operating system will become unfit with ACT Head Impact Tracker system, even if it used to be fit.
We are working hard to keep all the brands and operating systems on board, but it may be we will not always succeed, or that fixing issues might take longer time.
If you face issues after operating system update, or ACT Head Impact Tracker App update for that matter, we recommend to do the following:
– Restart the phone after the operating system update.
– Remove the old ACT Head Impact Tracker App before installing the new one (sometimes “Updating” is not complete and the App becomes something in-between the old and new and will not work.
– Restart the phone after installing ACT Head Impact Tracker App.
Always also good to visit the Application management (found in Settings) to remove all the unnecessary restrictions and such he update may have introduced. If the battery usage is restricted for example, it may interfere with the App functionality.
Please help us to get better by informing us on issues and changes relating to mobile device updates

We recommend to always remove the old App and only then install the new App. We do not recommend to use “Update” as sometimes the updating is not complete and the App becomes something in-between the old and new and will not work. When the new App-version is installed, restart or switch off and back on the phone. ACT Head Impact Tracker is using phone’s Bluetooth® wireless communication and sometimes this action is needed for the App to work as intended.

In some smartphone brands and models the 1^st letter is automatically upper case and a space may be added automatically after the period in your email address, check them. Also other autocorrection issues might occur. This is the likely reason for an email address being rejected by the system. Check that small letters in your email address are staying small letters and if space after period is automatically added, remove it.

You cannot change your user-ID once created. This feature is not available yet.  If your email changes and you do not have access to your old email anymore (the one which is your User-ID), you have to create a new User Account and add the head sensor to it.
Before you change your email and can’t use your User-ID anymore, remember to:
1. Take out your data (Coming soon: download your data via Browser Access) so that no impact history information is lost due to new User Account creation
2. Inform us at  about your User Account closure and ask us to delete your old account.

You can’t. This feature is not available at this time. Make sure to store your password carefully.

Contact us at  to see, if we can help you. Please note that we make no promises, data security is a priority in our actions. It is crucial that you store the User-ID and password carefully in a place which you can access without your mobile device in case it is lost or broken. 

ACT Head Impact Tracker products and services are not functional without location services, Bluetooth® wireless connection, mobile data and data roaming (if needed), or Wi-Fi . They all must be enabled and active when using the head sensor. Alternatively to mobile data and roaming, you can use a local area network (called also LAN or Wi-Fi). Hence always when using ACT Head Impact Tracker ensure to:
1. Enable location services on your mobile device for the App and always when using the App with the head sensor. Your mobile phone’s Bluetooth® wireless connection will not work without it, and ACT Head Impact Tracker will not work without Bluetooth® wireless connection.
2. Hence enable Bluetooth® wireless connection always when using App with the head sensor, or ACT Head Impact Tracker will not work.
3. Enable Mobile Data and roaming (if needed) for the App in your mobile device. Switch on mobile data and roaming always when using App with the head sensor. Alternatively ensure that you are connected to Wi-Fi (or LAN) for the whole time you are using the App with the head sensor, or ACT Head Impact Tracker will not work as intended.

You need to create a Profile to add and use the head sensor. One User Account can have multiple Profiles and head sensors added to them.

Yes. User Account can have multiple Profiles on it.

Yes. User Accounts can have multiple head sensors added to Profiles.

You cannot delete the Profile once it is done. Also note that you cannot change the Profile data like name, birth date or gender.

You can add and remove your Profile Shared Contacts by going on a Profile you wish to manage so that it opens on the screen > tap three small bullets on the upper right-hand corner of the screen > “Manage Profile Shares” appears, tap that. Tap on the green bullet with +-sign on it in the next screen opening to add another ACT Head Impact Tracker User Account as your Profile’s “Shared Contact”. You can remove a Shared Contact by swiping left and deleting “Shared Contact” from the list.
Please note:
1. Shared Contacts must have an User Account in ACT Head Impact Tracker and the App. All notifications are sent as in-App notifications and impact information can be received and read in the ACT Head Impact Tracker App only.
2. The emails nor the User Accounts you add to share your data with are not confirmed by the system. Ensure from your Shared Contacts that they have received your share and accepted it.
The Shared Contact will receive an invitation to your share in their ACT Head Impact Tracker App. They can either reject or approve your invitation. If they approve your invitation your Profile and the data it has and receives will emerge to their landing page. Shared Profiles carry small symbol with three bullets joined by two lines on the right hand side of the profile. The Shared profile can not be Shared  forward.
Do also note that All Profile’s “Shared Contacts” will receive all impact information on the Profile’s all sensors. Do not add “Shared Contact(s)” to the Profile if you do not want to share. You can have two or more Profiles and sensors if you want to share some impact information and keep other impact information to yourself/share it with different group of “Shared contacts”.

Yes.If you wish to only share some data, it is recommended to have two different profiles and sensors, one for the shared data and the other one for the data you do not wish to share.

1. IMPACT INFORMATION
Impact information is displayed in the App with numerical values and when applicable as a graph. Additional impact information, such as graphical illustration, can be accessed by tapping on the chosen impact on the profile’s impact history. Each impact also has time stamp on it, which tells when the impact has been recorded into the system, and impact’s index number. Read more about the impacts in “Why you should measure” and “Some reading we suggest”.

2. IMPACT HISTORY
Profile’s impact history is a record of impacts, combining impacts from all the sensors added on a profile. It can be accessed in the App by tapping on a chosen profile and green button next to text “Impact history” on the profile page. The last impact recorded is displayed on the top of list with information on which sensor has recorded it, when it has been recorded to the system, and an index number of the impact.

3. COMING SOON: BROWSER ACCESS
Through Browser Access Users can access their information via internet browser to import all user data to a computer where it can be further processed in applicable spreadsheets and database management systems. Access to Browser Access by clicking “Browser Access” link in the bottom of this page.
This feature is not yet available.

IMPORTANT NOTICE: This is the status of features and functionalities and their availability for the Users as of today. We reserve the right to these, any and all new service features and functionalities, their availability and accessibility in upcoming App updates and versions.

IMPORTANT NOTICE: Your ACT Head Impact Tracker application is part of system, where information flow from the head sensors to the cloud takes place. Use of mobile data on your mobile device with the application may occur at any time when ACT Head Impact Tracker head sensors are used. If you do not wish to be part of the system, turn Bluetooth off, or turn off the mobile data in your mobile device.

ACT Head Impact Tracker smartphone mobile App is free to download, and the use of the very basic service feature and functionality is free of charge.
In the future the App will contain in-App purchases, please note that many of the service features and functionalities will be available by subscription only. More information about the service features and functionalities, and their availability as they will be introduced in our website www.act-tracker.com

Your mobile phone’s Bluetooth® wireless connection is essential for ACT Head Impact Tracker to work near-real-time. The head sensor sends all the data via Bluetooth® wireless connection and Bluetooth® wireless connection is needed on the mobile device to receive that information from the head sensor. Bluetooth® wireless connection needs location services on your mobile phone to function. That’s why ACT Head Impact Tracker must use your location.

Also some future features and functionalities may need to use your location for other purposes, an example of this is soon-to-be-launched Fall Alert (you might know this as “crash sensor” functionality) which will be made available for subscription as an in-App purchase.

Your ACT Head Impact Tracker application is part of system, where information flow from the head sensors to the cloud takes place. We aim to ensure that information is moving as swiftly as possible. This is why use of mobile data on your mobile device with the application may occur at any time when ACT Head Impact Tracker head sensors are used within the data transfer’s reach. If you do not wish to be part of the system, turn Bluetooth off on your mobile device, or turn off the mobile data.

If your smartphone with the App breaks ACT Head Impact Tracker will not function as intended. The head sensor can save around 45 (versions 1.0 and 1.1, purchased before 15^th of November 2022) or 464 (version 1.2 purchased on 15^th of November 2022 or later) impacts to it, which can be downloaded by the App later, but the near-real-time delivery of the impact information is not possible if the phone is broken.

If you are outside the mobile network reach, have no coverage or connection to the mobile data or Wi-Fi, ACT Head Impact Tracker will not function as intended. The head sensor can save around 45 (versions 1.0 and 1.1, purchased before 15^th of November 2022) or 464 (version 1.2 purchased on 15^th of November 2022 or later) impacts to it, which can be downloaded by the App later, but the near-real-time delivery of the impact information in the App is disabled.

Sometimes you need to refresh the Profile page to receive latest impact information to it
You can simply do it by returning to landing page by clicking on the arrow on the top left corner and returning to the Profile page.

Your mobile device is like a small computer and sometimes something just might get jammed there, which also affects ACT Head Impact Tracker App functionality. Most typically mobile device’s Bluetooth wireless communication is the source of trouble for our users, and it features so that sensor(s) cannot get the connection to the App. You can notice this so that when an impact clearly occurs, but there is no information to it coming to the App. You might want to try these things to solve the issue:

1. Take off the phone’s power save mode by switching the phone active (screen becomes lighted). Also check that ACT Head Impact Tracker App is open and on top of the open Apps.
2. Check that your phone has Bluetooth wireless connection on and that location services is on.
3. Ensure your mobile device is compatible with ACT Head Impact Tracker App by checking the list of brands and models tested in our FAQ (www.act-tracker.com). Please note that we have not tested all the brands nor models, so it just may be that your device is not on the list and we have not tested it.
4. You might want to switch the Bluetooth wireless connection off and back on to see if that would be enough to reconnect.
5. You can also try closing ACT Head Impact Tracker App and opening it again. Is the issue still present? If yes…
6. You might need to restart your phone to solve the ”jam” in it.

Regarding Shared Profile, please note that all your Shared Contacts must have an User Account in ACT Head Impact Tracker and the App. The email (UserID) you type in to share with are not confirmed by the system. Ensure from your Shared Contacts that they have received your share and accepted it. All impact Information is sent in-App and can be received and read in the App only. All Profile’s “Profile Shares” will receive all impact information on all the Profile’s sensors. Hence do not add “Shared Contact(s)” to the Profile if you do not want to share all the information on it. You can have two or more Profiles with separate sensors to them if you want to share some impact information only and keep other impact information to yourself/share it with different group of “Shared contacts”.

There is lots of information on the impacts and forces acting on a head recorded.
To get the impact information:

1. Choose the Profile you wish to see, click on it.
2. The Profile view opens with latest impact on the top. Click ”Impact History” open by clicking on green button with +sign on it. Choose the Impact you wish to look closer at, click on it.
3. Impact view opens with numerical maximum g-force value during the measurement on top. Scroll down to view  the graphical illustration on the Total g-force (on red) and Axial g-forces.

With Profile Share you can share your impact information to other ACT Head Impact Tracker User Accounts in almost real time. This is how to add a share and how to remove a share:

1. To share Profile, choose Profile you want to share on the App’s landing page, click on it.
2. Profile view of the Profile you wish to share opens. Click three small dots on top of each other on the top right corner.
3. White block with text ”Manage profile shares” opens on the top right corner, click on it.
4. “Manage shares” page opens. To add a Profile Share, click green bullet with +sign to it on the bottom right corner.
5. “Share with email” page opens. Type on the line User Account’s UserID (=email) you want to make a Profile Share to. Note: Profile can only be shared with another ACT Head Impact Tracker User Account. Validity of User Account’s email is not done by the system, so ensure from the other User Account that they have received your Profile Share invitation and accepted it.
6. Your Profile Shares will become visible as white blocks on “Manage shares” page.
7. To remove Profile Share wipe left the on the “Manage Share” block you wish to remove.
8. “Remove Shared Access” window appears, Click “Continue” on it.
9. Click arrow on the top left corner to exit ”Manage Shares” page. Next time you enter there, the removed share has disappeared.

Menu: Logout, In case of an incident, ToS, PP and About

You can do and find all this in App’s ”Menu”, which can be accessed by clicking the 3 bars on top of each other on the top left corner of the App’s landing page.

In case of an Incident is a tool for you in case an incident happens on the pitch and you have no medical professionals nor sideline assessment tools available. It may help you to approach the situation in a calm and structured manner.

You can revisit our latest Terms of Use and Privacy Policy here.

In About you can get information on the App, trademarks and copyrights.

You can log out from the App by clicking Logout.

To view information of specific Profile

1. Click on the white Profile bar you wish to see
2. Profile page opens with the last impact information to it.
3. You can see or add sensors to the profile by clicking on green bullet with +sign to it on ”Sensors” bar.
4. You can see Profile’s impact history by clicking green bullet with +sign on ”Impact History” and history opens below it and can be scrolled down to see older impacts.
5. You can view each impact’s details by clicking on the impact you wish to take a closer look at in ”impact history” listing.
6. Impact view opens with its numerical information on the top and graphical illustrations available below.

1. Download the ACT Head Impact Tracker smartphone mobile App from Google Play. It is available for Android 9 or newer Android operating systems only. Note: App’s compatibility with all and every smartphone brand and model has not been tested and cannot be guaranteed. Updated list of brands and models tested can be found in FAQ in www.act-tracker.com.
2. Tap on “Register” button on the App’s front page. Add your email which will act as your User-ID. Note: Your user-ID must be your email address. You cannot change your user-ID once created.
3. Add a password. It has to have minimum 9 characters, contain small and capital letters, numbers and special characters. Use the eye-icon to check you wrote what you meant to. The App asks you to confirm the password by retyping it. The password must be exactly the same in both occasions to be registered. Tap “Continue”. Note: Save your password carefully! You can not change your password once created.
4. Select the country you are in. Tap “Continue”.
5. Read carefully our Privacy Policy, scroll down to the bottom, tic the box “I accept the terms mentioned above” by tapping the empty box before the text so that it becomes green and a tic appears to it. Tap “Continue”.
6. Read carefully our Terms of Use, scroll down to the bottom, tic the box “I accept the terms mentioned above” by tapping the empty box before the text so that it becomes green and a tic appears to it. Tap “Continue”.
7. Background appears with word “Registered” on it as soon as you have successfully registered your User account. A Login page appears automatically. You can login with your User-ID and Password. Tap “Login”. Type your User-ID and password. Tap “Continue”.
8. Create a Profile in your User Account to which you want to add the head sensor to. Tap “Add Profile”. Enter Profile name. For the data security reasons, we recommend not to use your own and/or full name. We ask you to name the Profile so that it is easier for you and your Shared Contacts to identify who is behind the Profile. We do not use your Profile name for any purpose. Then enter your “Birth date”. We ask this for statistical and research purposes, and to fulfill our legal obligations. Note: Persons younger than 16 years must not give us any personal information. Choose your “Gender”. We ask this information for the statistical and research purposes. The Profile is ready when it appears as white block on your App’s landing page. The Profile’s last recorded impact data will be shown on the landing page block along with your Profile name. Please note: You cannot remove or change the Profile once created.
9. Ensure location services and Bluetooth® wireless connection are enabled, on and active in your smartphone for the App and always when using it with the head sensor. Ensure mobile data and roaming (if needed) are enabled, on and active in your mobile device for the App and always when using it with the head sensor, or that you are connected to Wi-Fi. If you do not have mobile data or Wi-Fi at your disposal, please use the sensors in Tracker mode, this will significantly decrease their power consumption. Do notice, when sensors are on Tracker mode, real time delivery of sensor measurements is not working, but you have to download the impacts from the sensor to the App after the session when mobile device can be connected to mobile data or Wi-Fi.
10. Remove the head sensor from its package. Open the hatch. Add the coin cell battery by carefully sliding it underneath the silver-colored holder bridge as indicated by the arrow on the bridge + side is facing you and away from the electronics.
11. Locate the head sensor’s serial number also acting as Registration code, which is on the product label underneath the battery hatch. Open the hatch and you can see the white sticker on the lid. Registration code is a 6-digit code on the product label.
12. Close the hatch by pressing all the sides firmly together to seal the locks on them. Check that the sides are seamlessly connected with each other before the use. Please note: Inserting the battery may turn the sensor on, but some components might not turn on. Before use, switch the sensor off and back on.
13. Turn the head sensor on by pressing the on/off-button once slowly and firmly. The sensor is on when the small red led light next to the button starts to blink in slow frequency. If the light blinks in high frequency (in fast pace), the battery is almost empty. Change the battery or ACT Head Impact Tracker might not work as intended. If the light does not come on at all or the light comes on but it is not blinking, try with new battery. If the light still is not coming on at all, or the light comes on, but it is not blinking, the head sensor is not working as it is supposed to and should be replaced.
14. When the sensor is on, choose the Profile you want to add the sensor to, click on it. Click then green button next to “Sensors”, and then “Add Sensor” button. The App has found the sensor when it says: “Found 1 sensor” Click “Continue”. The App is connected to the sensor when it shows “Connected to 1/1 sensors”. Add Registration code to the line under the text. Click “Continue”. If the App can not find any sensor, switch the sensor off and back on, and try again. If the App finds more than one sensors, switch off all the other sensors than the one you want to register and try again. Please note: You can register the head sensor only once, and to one Profile only. It is not possible to remove or change the head sensor to another Profile once registered.
15. After the code is correctly typed, the App will confirm “Registration is successful”. This means your ACT Head Impact Tracker is ready for action.

TIPS AND TRICKS:

–To optimize the data delivery time, keep the mobile phones with Apps listening to the sensors screens lighted (not on a power save mode) and Apps opened and on the top. Apps on some phone models (like Samsung) do not work as intended and deliver the sensor data real time when they are on power save mode (screen shut off). If it is not possible to have all the phones screen lighted, try to have at least one. You can adjust the automatic screen shut time from the mobile device’s Settings.

–There are big differences to the mobile device brands and models how they work with the sensors. Ensure the compatibility of your device by checking the list of tested brands and models in our FAQ!

We would like to inform you that we have updated ACT Head Impact Tracker Android App in Google Play Store. If you have encountered issues with using ACT Head Impact Tracker, we strongly recommend that you update your App at the earliest convenience.

Check which App version you have
Check your ACT Head Impact Tracker App’s version number by tapping on the “Menu” (3 lines on the top lefthand corner on the landing page) > About >

If your App’s version number is 1.1. you are all set with the new App.
If your App’s version number is 1.0 , please update ACT Head Impact Tracker App by deleting the old App on your mobile phone, and installing the new from the Google Play Store. When the new App version is installed, switch the mobile phone off and back on. ACT Head Impact Tracker is using phone’s Bluetooth® wireless communication and sometimes this action is needed for the App to work as intended.
Have you experienced problems with your ACT Head Impact Tracker system during last couple of months?
The latest updates and changes on the multiple mobile devices with Android operating system have been nothing short of significant. These changes may have had critical impact to ACT Head Impact Tracker system connectivity, to be more precise: the head sensors have been unable to connect to the mobile phones and impact information has not been transmitted. These changes took gradually place in conjunction with Android operating system 11 and 12 launches. As a result, ACT Head Impact Tracker system has sometimes not functioned as intended, even not functioned at all in some mobile phones. This is why we made the App update.
We apologize the inconvenience to our Users.

The biggest changes with new App:

1. All Android phone brands (models) do not work, or do not work as intended with ACT Head Impact Tracker. Even if they have Android 9 operating system, or newer.

One or more of these brands (models) have been tested and ACT Head Impact Tracker system workedwith them as intended:
Samsung (Galaxy A21s Android OS 12, A41 Android OS11) Motorola (e20, Android OS 11)
Nokia (5.1, Android OS 11)

One or more of following brands (tested models) have been tested and have found to not always work as intended with ACT Head Impact Tracker system:
Xiaomi (Redmi 9a, Android OS 10)

One or more of following brands (models) have been tested and have found to not work with ACT Head Impact Tracker system:
OnePlus (Nord N100, Android OS 11)

Other than above mentioned brands and their models have not been tested and cannot be guaranteed to work with ACT Head Impact Tracker.

This listing and functionality is the status as of today. The mobile phone models, electronic components used in them, and operating systems they use are in constant change. We are working hard to keep up with the changes, improve the situation and do our best to update this list in our FAQ on our website, www.act-tracker.com/pages/faq.
We sincerely apologize the inconvenience the changes and updates cause to our users.

2. Bug fixes and improvements in the new App
A.) The impact time stamps are no longer affected by switching off the head sensor. Please do note: Always empty the sensor’s memory before changing the battery, or the time stamps will not be accurate.
B.) Dynamic Profile listing. The latest impacted profile will be featuring on top of the landing page’s profile listing.
C.) The graphical illustration of the g-force measurement includes only 3ms buffer memory and hence features more impact related measurement data.

Tips and tricks how to improve the functionality:

Samsung
Issues recorded and tips to solve them:
1. Persisting notifications on location or Bluetooth© wireless communication being disabled.
When you install the new ACT Head Impact Tracker App 1.1., you must give it permission to track the location, or Bluetooth© wireless communication will not function. Also, as before, Bluetooth© wireless connection has to be enabled when you are using head sensors. If you “enable” location and/or Bluetooth© wireless connection, but the notification(s) regarding stay on the landing page, close the App and open it again. This should remove already acted upon notification(s).
2. Some impacts do not show in the App.
A.) Ensure you have solid Wi-Fi connection, or have mobile data enabled and active.
B.) Open ACT Head Impact Tracker App, log in, keep it open and logged in when using with head sensors. Real time impact data delivery may also work when App is not open, or while using another application, but this cannot be granted.
C.) Keep the mobile phone active (i.e. screen lighted, not go to power save mode) on the sideline, when you are using ACT Head Impact Tracker head sensors. To adjust the automatic screen switch off: click “Settings” > “Screen” > “Screen switch off” > choose he longest time available. Real time impact data delivery may also work when the screen is off (on the power save mode), but this cannot be granted.
D.) If you have Android Operating system 12 or newer, ensure you have permission (“Allow”) for ACT Head Impact Tracker App also for “Nearby devices”. Click “Settings” > “Applications” > “ACT” > “Permissions” > “Nearby devices” > “Allow”
E.) Change default setting for battery use: “Settings” > “Applications” > “ACT” > “Battery”> choose “Unrestricted”.
F.) Turn off Bluetooth© wireless communication on your mobile phone and switch it back on again. Time to time the connection is just cut off (no notification to the App regarding) and needs to be reactivated again like this.

– Please note that if your phone&App have multiple head sensors to listen to, and/or the head sensors might be time to time out your mobile phone’s Bluetooth© wireless communication reach (couple of tens of meters in most conditions), the impact data may not transfer real time. If so, the head sensor will save the information to its memory (space for 45 impacts). It is recommended to frequently download saved impacts from each head sensor’s memory by switching the sensor off and back on so that it is in the proximity (within few meters) of the App. Ensure the mobile phone is connected to Wi-Fi or mobile data is enabled and active. Also highly recommended to do this every time before you change the battery.
– You can also use the head sensor(s) without Wi-Fi connection, mobile data or mobile phone with the App close by. If so, the head sensor(s) will not deliver the impacts in real time, but will save the impacts to the memory, and the data can be downloaded from them later. Please note: each head sensor can save up to 45 impacts to it, if this amount is exceeded, the oldest impact data will be deleted to make space for the new impact data. Download impacts from each head sensor’s memory on by one by switching the sensor off and back on so that it is in the proximity (within few meters) of the App. Ensure the mobile phone is connected to Wi-Fi or mobile data is enabled.

Motorola, Nokia
Issue recorded and tips to solve them:
1. Some impacts do not show in the App.
A.) Ensure you have solid Wi-Fi connection, or have mobile data enabled and active.
B.) Open ACT Head Impact Tracker App, log in, keep it open and logged in when using with head sensors. Real time impact data delivery may also work when App is not open, or while using another application, but this cannot be granted.
C.) Keep the mobile phone active (i.e. screen lighted, not go to power save mode) on the sideline, when you are using ACT Head Impact Tracker head sensors. Real time impact data delivery may also work when the screen is off (on the power save mode), but this cannot be granted.
D.) Remove restrictions on App’s battery use > choose “Unrestricted”.
E.) Turn off Bluetooth© wireless communication on your mobile phone and switch it back on again. Time to time the connection is just cut off (no notification to the App regarding) and needs to be reactivated again like this.

– Please note that if your phone&App have multiple head sensors to listen to, and/or the head sensors might be time to time out your mobile phone’s Bluetooth© wireless communication reach (couple of tens of meters in most conditions), the impact data may not transfer real time. If so, the head sensor will save the information to its memory (space for 45 impacts). It is recommended to frequently download saved impacts from each head sensor’s memory by switching the sensor off and back on so that it is in the proximity (within few meters) of the App. Ensure the mobile phone is connected to Wi-Fi or mobile data is enabled and active. Also highly recommended to do this every time before you change the battery.
– You can also use the head sensor(s) without Wi-Fi connection, mobile data or mobile phone with the App close by. If so, the head sensor(s) will not deliver the impacts in real time, but will save the impacts to the memory, and the data can be downloaded from them later. Please note: each head sensor can save up to 45 impacts to it, if this amount is exceeded, the oldest impact data will be deleted to make space for the new impact data. Download impacts from each head sensor’s memory one by one by switching the sensor off and back on so that it is in the proximity (within few meters) of the App. Ensure the mobile phone is connected to Wi-Fi or mobile data is enabled.

Xiaomi
We found these phones to have more frequent connectivity issues than the above brands. Especially when listening to 3 or more head sensors. Hence, we do not recommend using Xiaomi mobile phones with ACT Head Impact Tracker, especially if you are following more than 1-2 sensors with it and wish to have real time impact data delivered.
Issue(s) recorded and tips to solve them:
1. Some impacts do not show in the App.
A.) Ensure you have solid Wi-Fi connection, or have mobile data enabled and active.
B.) Open ACT Head Impact Tracker App and log in, keep the App open and logged in when using with head sensors. Real time impact data delivery may also work when App is not open, or while using another application, but this cannot be granted.
C.) Keep the mobile phone active (i.e. screen lighted, not go to power save mode) on the sideline, when you are using ACT Head Impact Tracker head sensors. Real time impact data delivery may also work when the screen is off (on the power save mode), but this cannot be granted.
D.) Remove restrictions on App’s battery use > choose “Unrestricted”.
E.) Turn off Bluetooth© wireless communication on your mobile phone and switch it back on again.Time to time the connection is just cut off (no notification to the App regarding) and needs to be reactivated again like this.
2.) Difficulties in maintaining the connection to more than 1-2 head sensors at the time
Same tips as above.
3.) Time stamps on impacts saved in head sensor’s memory and transmitted after the head sensor has been switched off were not always fully accurate.

– Please note that if your phone&App have multiple head sensors to listen to, and/or the head sensors might be time to time out your mobile phone’s Bluetooth© wireless communication reach (couple of tens of meters in most conditions), the impact data may not transfer real time. If so, the head sensor will save the information to its memory (space for 45 impacts). It is recommended to frequently download saved impacts from each head sensor’s memory by switching the sensor off and back on so that it is in the proximity (within few meters) of the App. Ensure the mobile phone is connected to Wi-Fi or mobile data is enabled and active. Also highly recommended to do this every time before you change the battery.
– You can also use the head sensor(s) without Wi-Fi connection, mobile data or mobile phone with the App close by. If so, the head sensor(s) will not deliver the impacts in real time, but will save the impacts to the memory, and the data can be downloaded from them later. Please note: each head sensor can save up to 45 impacts to it, if this amount is exceeded, the oldest impact data will be deleted to make space for the new impact data. Download impacts from each head sensor’s memory one by one by switching the sensor off and back on so that it is in the proximity (within few meters) of the App. Ensure the mobile phone is connected to Wi-Fi or mobile data is enabled.

OnePlus
In our tests OnePlus models were not working with ACT Head Impact Tracker. OnePlus mobile devices cannot be used with ACT Head Impact Tracker.

This listing and functionality is the status as of today. The brands, models, components used in them, and operating systems they have are in constant change. We do our best to improve the number of functional brands and models. Please see updated listing in our FAQ on our website, www.act-tracker.com/pages/faq

We sincerely apologize the inconvenience the changes and updates cause to our users.