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.