I create beautiful apps using Xamarin. I store data locally (offline) using SQLite, or online on your production server / Azure. As a backand I can include a RESTful API using ASP.NET Core project. If you need a native app, I can make one for Android using Kotlin and Android Studio. I have created business apps, cooperating with my business desktop applications as a part of the whole company system. Examples: -you as a manager set from desktop what each employee sees in his "To-Do´s" section on mobile. -You as a dispatcher generate a QR on desktop, which will be later scanned with the driver´s mobile app. Then you see again in your desktop app, that the load xy was loaded