There is a lot to unpack but I'll answer what I can.
React Native
I don't have any experience with RN so I can't speak to how it compares with Flutter. There are a fair amount of blog posts floating around though that attempt to do comparisons.
Platform customization
I know you can do platform specific integrations but I've not attempted them. Here are the docs
Platform UI
Yes you can have platform specific UI. Here is a codelab that has iOS and Android customize UI.
User preference of platform UI
This is a often debated topic. I see most brands moving to having their branded UI everywhere, while I see power users complaining when apps are not "platform" enough for them. I recommend siding more on building a great UI and less on being exactly platform perfect.
App Store
There are a number of Flutter apps published to the App Store so it is certainly doable to make Apple compliant apps.
From an android platform perspective, I'd say its pretty easy and straight forward. I'm currently attempting to create a flutter pluggin that works with ndk. The limitations that I noticed are that of the platform you're developing for
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There is a lot to unpack but I'll answer what I can.
React Native
I don't have any experience with RN so I can't speak to how it compares with Flutter. There are a fair amount of blog posts floating around though that attempt to do comparisons.
Platform customization
I know you can do platform specific integrations but I've not attempted them. Here are the docs
Platform UI
Yes you can have platform specific UI. Here is a codelab that has iOS and Android customize UI.
User preference of platform UI
This is a often debated topic. I see most brands moving to having their branded UI everywhere, while I see power users complaining when apps are not "platform" enough for them. I recommend siding more on building a great UI and less on being exactly platform perfect.
App Store
There are a number of Flutter apps published to the App Store so it is certainly doable to make Apple compliant apps.
From an android platform perspective, I'd say its pretty easy and straight forward. I'm currently attempting to create a flutter pluggin that works with ndk. The limitations that I noticed are that of the platform you're developing for