I've checked your project requirement and understood whole work scale.
I'm a senior Web and Mobile developer on Freelancer. I'm working as an independent freelancer so I can work full-time. I always write scalable, performance-wise and robust code. I also aim for the clean, elegant and sophisticated design style. Thanks for consideration.
My area of expertise:
iOS mobile development - iOS 5 ~ 11, Xcode, swift, objective-c, cocoa
Android mobile development - Android SDK, Android NDK, Android Studio, Java
Hybrid mobile development - Xamarin, Phonegap, Ionic, React JS, React Native
Game Development - Cocos2d/Unity2D/Unity3d/Unreal
BackEnd API development - FireBase/NodeJS/PHP
Database - MySQL/MongoDB/PostgreSQL/Sqlite/NoSQL If you have these apps, then there are your name who is owner of the best app. Hope that you will become a man/woman like this.
I can make your idea to reality!