What type of android app you are trying to create? Hope it's not a crypto wallet? Or money savings app? You will need to hire a professional for that to work out for you, go to services section of this forum below and create a topic about hiring a qualified personal to create app for you
What do you mean with 'Hope it's not a crypto wallet? you guys are funny. Let me tell you this, hope you don't get a heart attack, Yes it's for a crypto Wallet.