Hi,
I can develop that iOS math game app. Plus have full dev team available for this project.
Please contact me for more details and samples of my work.
I'm an expert mobile developer with 6+ years of experience in C#, Unity3D, Qt, Visual Studio, Objective C, Swift, Xamarin, Ionic and Cordova. I develop for iOS and Android as well.
Best regards,
Dmitry,
Miami