Develop A Productivity Android Mobile App

Hi!
I’m William. I’m looking to partner with a developer to create a productivity mobile app. The app will have a Pomodoro technique timer, music playlists, and block social media app notifications

I'm planning to monetize the app with ads on AdMob and in-app purchases. I’ll cover all the marketing and advertising costs. My team will scale the app to $15K per month with our marketing strategy. So I'm looking for a developer partner to develop & provide technical support long-term. I’ll be paying 15% of the app’s revenue every month to the developer through Freelancer.com.