Offline turn-by-turn Navigation?

Hello

I would like to create an offline turn-by-turn navigation map.

is it possible to create an app like this that can navigate to offline maps and make a shortest path or route without using internet connection?

can somebody help me please?

Yes it is possible. Standalone car GPS units do this. However, you will need to license the GIS data from somewhere. And that will cost $$$.

Thankyou mind for replying.