If you’re having trouble getting around town and need turn by turn guidance, you can finally turn to TomTom, one of the biggest names in the industry, on your iPhone. The navigation company has finally released the app they debuted with the iPhone 3GS.

The app is one of the more expensive in the App Store, and certainly at the high end of the navigation price range, at $100. That does not include the car kit, which adds a speaker, an audio output jack to integrate with your car stereo, and a microphone for using the phone while your TomTom is active.

I think the real dealbreaker with this app is going to be how it handles phone features. Unfortunately, the iPhone doesn’t allow multitasking, so your TomTom will close when you receive a phone call. That could suck really, really hard if it can’t reposition via GPS quickly enough. On the other hand, if it works well, it could be a pretty sweet deal for those of you in the market for some GPS help.