For platform specific stuff it's easy to write a wrapper. Most of the time Xamarin is very closely up to date with Apple's SDK, due to some automated tooling th

For platform specific stuff it's easy to write a wrapper. Most of the time Xamarin is very closely up to date with Apple's SDK, due to some automated tooling that generates the C# classes, interfaces and such. So you should be able to either use the C# wrappers for platform specific functionality, or alternatively can quite easily create your own binding using the Sharpie tool [0]. The last 2 apps I've been working on were Xamarin apps and I'd guess the first app probably shares 80% - 85% of the code base and the second app 95%. The first app less, because the client wanted a specialised camera module, which required me to create bindings for the Fotoapparat [1] library on the Android platform. Both apps used Xamarin Forms. The platform specific code, all things considered, is really small. I should note I've also done a lot of Swift & Objective-C development in the past and a little bit of Java. I also tried Xamarin around 2013 and back then the experience wasn't as good as it's right now. My major gripes with Xamarin currently are: - The IDE becomes slow sometimes (fixed with a restart) - The IDE sometimes has issues connecting to the Android emulator for debugging (often restarting the computer fixes this). I should also note that if I were to write an iOS only app, I'd definitely use Swift (I love working in Swift, more than C#, Objective-C, Java, …). But for multi-platform apps, currently my tool of choice is Xamarin. --- [0]: https://docs.microsoft.com/en-us/xamarin/cross-platform/macios/binding/objective-sharpie/ https://docs.microsoft.com/en-us/xamarin/cross-platform/maci... [1]: https://github.com/RedApparat/Fotoapparat https://github.com/RedApparat/Fotoapparat