[Zigurd]

I have had clients that use Xamarin. This is what I've observed:

1. If you don't use Xamarin and you don't have a team in-house that uses C#, don't bother. You'll be better off doing native development on iOS and Android platforms.

2. Your app won't be as pretty, and it won't adhere to platform native UI conventions as well if you use Xamarin.

3. Xamarin does a better job of it than most but it will still be lagging in access to the latest features.

4. BUT, if you are doing a vertical market app that wants to be cross-platform AND you have C# coders you can apply to that task, Xamarin is the best choice.

There are a lot of places where choosing Xamarin makes a lot of sense. And the people who created Xamarin are excellent. And now that Xamarin is owned by MS, it won't die because it is hard to make money as a cross-platform startup. But as with every other cross-platform tool for non-game apps I've seen, it isn't the best choice in green-field situations.