If you want to have the tracker in two different phone/app or share it with a friend:
Your app:
1. Open your device in the app
2. Select a tracker by pressing on the trackers name
3. Press the Squares/QR-symbol sign in the top left corner
4. Press "Generate QR" in the popup
5. Hold the QR code ready for your friend
Friend's app:
1. Press the plus (+) sign in the top right corner of the main screen
2. Press "Add QR code from a friend"
3. Scan the QR code in the other app