If you wish to completely wipe your activity data (present and past) from your tracker and the app please do the following:
- Open the App
- Tap Device (from the bottom menu)
- Tap Unbind (from the bottom of the page)
- Tap Unbind again when prompted
- Wait for Unbind Successful message to appear
- Delete the app from your device
- Re-install the app on to your device and run through the setup process until your tracker is paired to your device again. You should now have a clean slate to start from.