I have been working on Windows Universal Platform. There is definitely a huge gap on database side right now. I recently ported LevelDB to the platform and I strongly feel if nessDB can be written as a cross platform library, creating proper abstractions (so that it can be compiled on Mac, Linux, and Windows) it can be made into a library that we can actually port to iOS, Android, and UWP making it a standard key-value store for all client side platforms.
I don't know how much you will be interested in creating such option for nessDB but I think nessDB can be converted into a standard go to embedded key-value store for mobile platforms.