Are you still improving the app? Because it has been years ago since i last used it, and i was dissapointed to see that the interface hasn't changed a bit!
Im on iPhone XR and could use the extra space that can be gained here and there to navigate without irritatations.
i love your work, the app is great and does a lot of things better than other apps. For example MIDI notes drawing etc can be so annoying on most of these music apps.
But please, don't sit back and cash in.. Where is your passion, has it left you? Your app needs innovations really dude