Hello, this looks like a cool product, congratulations.

How does it handle the different UI guidelines on the two platforms?

I have not been using Android for some years, but the first example that comes to my mind is that as far as I remember Android has a platform-level back button, while on iOS each application provides a "back" link to be tapped to go back to its previous screen. If I wanted a single code base that followed the recommended UI approach on each platform in order to be as user friendly as possible, would I need to write certain parts twice using #IFDEF or similar blocks?