Why Android first?
Android gives an app the room to act as a launcher and to manage other apps in ways Apple does not allow, which is exactly what an earn-first model needs. That is why Earnest started on Android and is honest that it is Android-only for now. On a normal, non-rooted device, Basic protection works with no setup. If you want to block uninstalls and lock the whole tablet to an allowlist, that is an optional Max protection mode you can choose to enable, and it is never required to use the app.
