Certain devices (e.g. OnePlus) are automatically closing down apps that are running on the background. This means that, when you are tracking your training or hack, the device will stop your tracking after a couple of minutes.
How to avoid this?
1. Start up EQFix
2. Open your 'recent apps' (= button next to home button)
3. Press the 'lock' icon at the top right to lock EQFix and make sure your phone is not closing the app automatically