The app features location-based searches, speed camera alerts, voice instructions, automatic re-routing if a turn is missed, ‘IQ routes' (which vary according to the time of day) and route demo.
iPhone-specific enhancements include portrait and landscape modes, pinch-to-zoom map controls and the ability to navigate to addresses in the user's address book.
The TomTom app costs £59.99 for a single region, while maps for the whole of Western Europe cost £79.99.
TomTom has indicated it will release an iPhone car kit, including enhanced GPS receiver, mount, speakers and charge cable, which with the maps transforms the iPhone into a traditional satnav device.
The release of the TomTom iPhone app raises questions over the future of TomTom as a stand alone device.
Smartphones have already begun to replace MP3 players, and it appears to be only a matter of time before satnav devices and smartphone similarly converge.
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