No Sound & freezes on iOS 9.1

This app is great but needs upgrade!
There is No Sound on any scale you want to play, the continue playing option doesnt work and it will freeze the app after one loop.

App Name: Star Scales Pro
App version: 3.6.2
Model: iPhone 6 Plus
iOS version: 9.1

Gerard C about Star Scales Pro For Guitar, v3.6.2