Feature-wise, the Android version of Music Studio is behind the iOS version. This has technical and business reasons, carried over from the past, which cannot be resolved quickly. You can find the feature comparison table at Music Studio - Overview
There are plans to further develop Music Studio on both platforms, update releases will be announced once they become available.
If you purchased Music Studio on the Google Play Store and would like a full refund, please write an email to support@xewton.com and tell us your Google Play Store account email address.