Yes, an app is in the works.

The MIDI implementation on H90 is very simple. If you don’t want to use MIDI, you can use a 3-button aux switch to scroll through and select Programs.

Many users find that the UI of the H90 is an improvement compared to the H9, and there are many UI choices that were made with live performance in mind.

I understand that H9 Control has a simple interface to select new presets, but the H90’s UI is also very simple and hands on once you get the hang of things.

Let me know if you have any other questions.