[GekkePrutser]

It shouldn't be non-native, that's the problem. The best apps are always native ones. They make the most of the available APIs, fit in the OS the best both graphically and technically, and are the fastest.

If it has to be cross platform, something like React Native which leverages system controls would be a better approach than flutter which draws its own controls. But even there you will have to deal with a lot of translation due to it being JavaScript.