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If I could fix one thing in Flutter with a magic wand, it would be scrolling. There's something fundamentally different how Flutter apps scroll compared to native views. E.g. on Android overscroll doesn't look well when flinging, on iOS the keyboard will never affect the scrollable in intuitive way.

I haven't used it in a long time. The idea of those tools is to show a Flutter control over the top of a "native" control and compare pixels and gesture responses. scroll_overlay was one where you just scrolled and it had stripes in both iOS and Flutter so you could see how they differed.

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Oh no. The last time I patched it (3 years ago) it was 98% in sync. I think there have been changes in iOS causing the difference. There are hard tests within flutter that should have prevented any regression there.

I'm sure patches are very welcome! Both to the tool and the underlying framework code. If you search around in the issues database you'll find lots of other bugs on this looking at differences in other OS versions.

One of the *original* reasons we created Flutter was to have perfect, interact-able animations (e.g. that you could stop a drawer, mid fling). So I'm absolutely certain it's possible to be perfect here. My guess is just no one has looked in a while.