I've done something similar, but with JUCE [1] - which is a very amazing framework for building audio software, plugins, synthesizers and things.

I tell you, there are very few things more satisfying than seeing the same high performance C++ codebase running on Windows, Linux, MacOS, iOS and Android .. and the users don't know, don't care, and remain happily oblivious to the fact that none of the controls they are so gleefully slinging around are native. They Just Work™. (Including with Accessibility features..)

[1] = http://juce.com/