How to do Map Navigation for iPhone support?

Here is Google Map Navigation for Android Mobiles:

http://www.youtube.com/watch?v=lwggXqMZZ8w

Can we achieve this functionality for i开发者_StackOverflow社区phone? Is there any map api available for this which provides directions and details on GPS bases as well text (source to destination) bases?

If Yes, please provide some links regarding those.

---

It is against google's terms of service (relating to MapKit) to do turn by turn navigation, however you can work around it using the google maps web api and create custom code.

---

For speech recognition you can use this:

I used Open Ears, which was quite easy and works really fine for text-to-speech and recognition.

OpenEars is an open source framework for performing continuous speech recognition, text-to-speech, and language model generation in iOS. It uses the CMU Pocketsphinx, CMU Flite and MITLM libraries.