Use the on-screen numpad, select type, category, date, and comment, then tap 'check' button.
To edit, tap on a transaction to open the edit screen. To delete, tap and hold the backspace button in numpad until the icon changes to a trash can, then release.
After signing in with Google, go to Backup & Restore settings screen and tap "Backup". You can also enable automatic backups.
After signing in with the same Google account, go to Backup & Restore settings screen and tap "Restore".