That's really neat! But you may want to scale your pricing with your ambitions. That's very cheap, and it will be much harder to increase single-purchase pricing if you start at 4.99$. Totally unrequested advice, but maybe a 4.99$ "essentials" version that acts like a flipbook, and a 49.99$ "pro" or "full" version that includes future features you might add down the road, like more tweenable properties or IK bones.

Really nice job on the app so far! I also really like your AI use statement. I'll keep Animate in mind when I need something like this!