Xamarin VS Avalonia

You can migrate your app to .NET 6 or .NET 7 for Android now - https://github.com/xamarin/xamarin-android/wiki/Migrating-Xamarin.Android-Applications-to-.NET-6

My grad learned basic Android dev in like a week, and proceeded to smash it out better and faster than the original. Jetpack Compose is fantastic and simply unavailable in Xamarin.

Xamarin.Android: Licencia MIT

I read that Broadcast Receiver is no longer guarenteed to trigger on exact times. Which doesn't really matter for my purpose, but seemed to me to be an indication that this wasn't quite what I was looking for.

You can build it yourself or download a package from https://github.com/xamarin/xamarin-android.

MAUI on Android uses: https://github.com/xamarin/xamarin-android

Google updated their .xml file in a way our code couldn't handle: https://github.com/xamarin/xamarin-android/issues/6965

WPF is not the best example of open source, as some components are still closed source. Though it only runs on Windows, a closed source operating system, so perhaps that is not so important.

https://github.com/dotnet/wpf/issues/2554

That said, there are cross platform, open source .NET UI frameworks out there, including one that is inspired by WPF:

https://avaloniaui.net/

You might also want to look at AvaloniaUI[0] for a cross platform .NET GUI library. It is similar to WPF but much nicer to work with.

[0] https://github.com/AvaloniaUI/Avalonia

Production user here. There's no money gotchas. They're above reproach. In fact, I've received considerable free support from their devs on GitHub Issues [1].

The Avalonia business model is based on selling XPF, which runs WPF (Windows-only) apps on other platforms. That's very interesting to big corps with existing codebases.

See my comment [2]

[1] https://github.com/AvaloniaUI/Avalonia/issues

[2] https://news.ycombinator.com/item?id=39246988#39249128

Yes, but the portable GUI frameworks by Microsoft themselves are generally not very good, and they tend to be abandoned after a couple of years.

Avalonia is developed outside of the Microsoft corporate madness and seems to be slowly becoming the defacto cross-platform framework because it is expected to last a bit longer than a manager's attention span: https://avaloniaui.net/

Not my comment, but relevant here "The problem with compiling Skia to WASM is you'll lose any benefits of hardware graphics acceleration on the device."

(From https://github.com/AvaloniaUI/Avalonia/discussions/6831#disc... )

It's a bit of a hit and miss as of today. CLI, back-end and natively compiled libraries (think dll/so/dylib or even .lib/.a - you can statically link NAOT binaries into other "unmanaged" code) work best, GUI - requires more work.

Avalonia[0] and MAUI[1] have known working templates with it, but YMMV.

[0] https://github.com/lixinyang123/AvaloniaAOT / https://github.com/AvaloniaUI/Avalonia/ / honorable mention https://github.com/VincentH-Net/CSharpForMarkup

[1] https://github.com/dotnet/maui (try out with just true in csproj - it is known to work e.g. on iOS)