This app was mentioned in 5 comments, with an average of 2.20 upvotes
Looks like a f2p MMO. The screens don't show much about the gameplay, but it looks actiony? Mostly they just advertise that it has friend and romance systems, something about collecting fairies to win, and a selfie system.
In-app products $1.19 - $134.99 per item. Not gonna bother installing to find out what they are lol.
Starry Fantasy Online, which I think became more fun & interesting after version updated recently, i met a lot friends from different places cause it's a global game. They also have many interesting reward in fans club page, you can get extra reward from those events.
https://play.google.com/store/apps/details?id=com.istargame.android.sfol.global&hl=zh_TW
Meets your requirements(i guess) but the game is online.
Link for anyone actually interested.