Xamarin.Forms reached end of support, putting a 35+ screen customer booking app at risk. I migrated it to .NET MAUI for iOS and Android with 100% UI and feature parity, screen by screen. Provider search, booking, feedback and login were rebuilt with MVVM, Shell navigation, dependency injection and MAUI compatible libraries in C# and XAML. I also improved startup time, image caching and list virtualization, and kept SQLite offline storage, Firebase push and the Azure App Service backend working.