This app stores data on your device. If you choose to sign in, your email address and an account ID are stored with Google Firebase so your progress can sync across your devices.
Guests keep all data on the device only. You can sign out at any time from the About screen. Signing out keeps your progress on the device.
Firebase is provided by Google and has its own privacy policy.
If you delete the app, its locally stored data is removed from your device. Data stored in your account remains until you delete it.
Questions about this policy: jdonghoon2002@gmail.com