In my experience, apps rewritten in Flutter are janky, to the point where I can spot them a mile off - especially in animations/transitions and fake native widgets (based on a sample of 2 apps which I use often and have been rewritten in Flutter recently: Philips Hue and EE mobile network).
Same can also be true of RN (or native!) of course, and I’m sure with enough work the apps in question could be made slicker and it probably wasn’t a priority; but they’re both developed by large companies and to me as an iOS user, feel pretty bad compared to their previous native implementation, so Flutter is definitely not a magic bullet.
Same can also be true of RN (or native!) of course, and I’m sure with enough work the apps in question could be made slicker and it probably wasn’t a priority; but they’re both developed by large companies and to me as an iOS user, feel pretty bad compared to their previous native implementation, so Flutter is definitely not a magic bullet.