Please update the app!

This used to be a very good app back on my iphone 4, but it has seemingly not been updated in years, despite the subscription service still costing the same.
If the dev reads this - please update the app to the newest API! The casting to a TV/Rolu/Chromecast has been broken since iOS 9 update!

darkfalzxl about Crystal TV+, v3.1.790