AppSheet - AppSheet enables users to create mobile apps instantly for both OS and Android.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Clappia - No Code platform where building business process apps is as easy as working with Spreadsheets
Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
U3.net - Create a full-fledged mobile application without Coding
Kodular - Much more than a modern app creator without coding