Been building a theme park app with a tiny lantern spirit living in the header. He eats the notifications. If you pet him long enough he falls asleep. :D IMO this is what Flutter is particularly good at. You can control literally everything about how your widgets render and behave. Material and Cupertino are there if you want them, but nothing forces you into a boring native look. You build your design system once and it runs exactly the same on every platform, so you can be as bold and weird with it as you want. Flutter Scene is a complete 3D game engine for Flutter. It's powered by Impeller and Flutter GPU, and it runs on mobile, desktop, and web using nothing but Flutter's built-in SDK features. It's built to help you make any interaction you can imagine for your app real.