Copy Android App Data Using Backup

tl;dr

When migrating to a new phone, you can copy most app data using the apt backup and restore function.

In order to do this, you need to find the package name of the app whose data you want to copy, e.g. com.navigator.foo.

Then create the backup from your old phone, the output will be dumped into the file backup.ap.

apt backup --no-apk com.navigator.foo

After this connect your new phone and restore the backup:

apt restore backup.ap