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I think it depends on the app. You say the app will be heavy on animations. With that bit of information I would definitely avoid React Native. Go pure native. It will be a lot more work of course, since you need to build 2 apps. But even with the excellent Reanimated 2 library for React Native (which does the animation work on a "native" UI thread rather than the JS thread), animations are challenging. I'm currently struggling with an unresolved bug in the Reanimated 2 library that is killing me - my app is crashing when the user simply switches to landscape mode. I'm sure this wouldn't happen with a "pure" native app. (There would be a whole set of _other_ problems, though, for sure).