After several low-level fixes and changes, we have now managed to get RW Net 4 running on an Android device.
It is the exact same .NET assembly that you also use with Visual Studio and Windows.
The application below was developed with Xamarin and Mono/Android:
Now it is up to you to find out, where you can benefit from off-line route calculations in the field – requiring no expensive data connection !!
To be part of RW Net 4.17, which shall very soon be released.