A simple game (1vs1) where the user who spends the longest time with his finger on the screen wins -- 2

-In this multiplayer game (1vs1) you and your opponent have to bet an amount of money and then put their fingers in their screens and the last standing takes all the money.
-I want the game in iOS
-The 1vs1 will be in real time.
-The app have to be simple , because it will help to save and optimize battery and the other reason is the style of the the app (simple)
-The app is inspired in the app "Finger on the app"