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> Built on GTK, Relm4 runs on bare metal with no additional runtime in between.

So, not native in the sense of using or even resembling the native UI toolkit.

unless, of course, your native UI toolkit _is_ GTK

Sure. But you're stuck with GTK on every platform. "Cross platform, so long as you want to use GTK everywhere" is much less exciting than using actual native cross-platform UI elements.

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