itch.io

The developer already said why he doesn't do a standalone application for Android because it's too big. You don't need to download all of JoiPlay's plugins just the two required for Ren'Py games. With JoiPlay you can have all your games in one launcher and you don't have to a lot of icons on your home screen or app drawer.

"Harem Hotel has grown too big to fit on .apk. Android users will now need to follow the guide at the bottom of this post to play on android. This is, unfortunately, the only way I can continue supporting the android version. One advantage is that the android version is now in HD!"

 Source: Patreon (the whole message is a direct link)