When comparing Xamarin vs Catel, the Slant community recommends Xamarin for most people. In the question“What are the best cross platform tools for C# developers?” Xamarin is ranked 2nd while Catel is ranked 10th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Xamarin Insights and Test Cloud increase user experience
Pro Cross-platform
Apps built with Xamarin can run natively on Android, iOS and Windows Mobile. Xamarin compiles the same C# or F# codebase to native code that runs on several platforms.
Pro Open source
The Xamarin SDK is free and open source and released under the MIT license.
Pro Business oriented
Complete set of modular functionality for Line of Business applications written in any .NET technology, from client to server.
Pro Well documented
Cons
Con Build time tends to be longer than Android Studio
Con Slow to implement new features; must wait 1+ month to be able to access it
Con UI editing and creation is unstable
Con Missing examples
At the bottom of the GitHub page it still says:
// todo: add wpf
// todo: add uwp
Con Mostly a single person project
As can be seen in the GitHub Issues, most issues are handled by a single person. Most issues are solved which is quite impressive, but this situation is not ideal for the future of an open-source project.