Important question for me as well. As a solo amateur developer I don't have time to keep up with the constant development of all the different platforms.

I love the idea of this tool.

This came just at the right time. I'm putting together a series of animations for patient education. In trying to make things cross-platform I had to resort to AE and non-interactive video. Lottie looks like it will enable me to string together something nicer, using native drawing functionality, and can incorporate more interactivity.

in less than 48 hours Martijn van Dijk made this: https://github.com/martijn00/LottieXamarin Check it out!