Creating a mobile casino app will be a terrible idea. Crypto casinos have multiple platforms/games in them. The UI is dynamic so a suitable or one pattern UI cannot work for it that is why they dont bother creating a mobile app for. Take for instance the Bitcointalk forum which is very complex with so many board, imagine having an app for it it might become so not unfriendly. However, casinos should still stick to the Youtube and Binance pattern of making apps because it works better that way. Since it involves embedding their website mobile view like a mobile app and launching it on playstore.