Glitches and Crashes with iphone latest updatw – Perfect Tempo Review

Hello! I use this app to teach ballet classes and i love it, But now that I updated my iphone it is glitchy and very annoying to the point i cant use it without wasting time. The pause/play button doesnt work right, and the app crashes all the time now. Please fix so I can continue using it! Please!
Review by danie11ey on Perfect Tempo.