Hello,
I have read your project you need a video multi-screen app for fitness I am confident I can deliver a powerful end-result to you as well. My prime objective is client satisfaction and fulfills their needs with unlimited efforts.
I have been designing and developing mobile applications for iOS and Android for more than 3 years and have very strong hand on Android Studio, Eclipse, Xcode, Swift, Objective - C, material design, API integration, social media integration, payment gateway integration, etc.
Can you please share more details about what functionalities you want
Thanks!