Note: Passcodes are only available for Boxer on iOS. Passcode support for Android is on our to-do list, and you can add your vote for it here.
To turn on a passcode:
1. Open up the app settings.
2. Select "Advanced" from underneath the "More" section.
3. Select "Passcode" from the list.
4. From here, you will be presented with the option to either set up a passcode or enable TouchID.