Xamarin is an open source framework to create cross-platform applications for Android, iOS, and UWP (Universal Windows Platform) devices. You can develop a Xamarin app using C# and XAML, and deploy the same app to Android, iOS and Windows.
ePortal is integrated with this framework and allows you to develop a native mobile app for Android, iOS, and Windows UWP. These applications interface through the ePortal Runtime environment, with back-end systems running on MCP, OS 2200, and AB Suite for Windows.