title: Is it possible to create turn-by-turn GPS navigation app on Android/iOS using Google Maps?
body: <p>Today I've talked to a client and he wants to build a simple navigation APP on Android! </p>
  
  <p>Basically we could use Google maps, place some of "our" markers to show some locations (restaurants, hotels etc.) .. also we need to show user's friends near by! </p>
  
  <p>Everything of that is possible in Google Maps API on Android, except I can not find any useful information about Turn-by-turn navigation implementation inside my own app (without switching to Google Maps App) .. </p>
  
  <p>Can someone simply clarify - is it possible to use Google Maps inside an Android app to create turn-by-turn GPS based app?</p>
  
  <p>thanks</p>