I think he has Android and ATV versions based on Android 7. See here for ATV. See here for Normal Android.
I recommend carefully reading his posts on those to avoid possible difficulty.
As to contacting superceleron, I “@” him above. He will get a notification and likely reply when time permits. As I understand it, he is currently very busy with his professional work. It could be a bit before he has time to reply, patience may be needed.