Create a Navigation IOS APP

How can i use MapKit and Google Maps to build a simple navigation APP ? Is there an API to create directions and routes or i need to use some sorts of web ser开发者_Go百科vice ? What you suggest ?

The Google Maps API Terms of Service (linked to from the MKMapView documentation) explicitly forbid the use of Google Maps for navigation purposes. You would need to provide your own maps (e.g. OpenStreetMap).