Download Joiplay 7.7.1 and the Ren’py plugins,
The Harem Hotel downloaded from the link on this page is the pure PC version.
There is also a Mac version, would that work on an IPad?
On Android Harem Hotel works with the latest Joiplay, but Renpy Plugin must be version 7.7.1. This game is still Python 2.x. Maybe You need RenPyiOS that supports Python 2 and Renpy version 7?