Need to create a mobile app -- 2

I need someone to create a mobile app which the access to it will cost 20 USD a month, its a trading app where 4 people will send signals, will be posted on android and app store, the creator of the app will receive 8% of the earnings of the app, I have 460 people interested in the access and every day more, I'm sure this app will go far
Si hablas español mucho mejor