Try Azure App Service
Azure App Service is a cloud offering that integrates everything you need to quickly and easily build web and mobile apps for any platform or device.
Enjoy a time-limited Azure App Service experience without a subscription, free of charge and commitment.
Select a template and create your Mobile App
A mobile dashboard app for a cable company technician, or any other mobile workforce, available for Xamarin Forms. Full sample at https://github.com/azure/fieldengineer/.
This is a simple todo list app, available for iOS, Android, Xamarin, and HTML/JS.
A mobile sales dashboard CRM app, available for Xamarin Forms. Full sample at https://github.com/xamarin/app-crm/.