TomTom, one of the big names in GPS technology, has released a navigation application for the Apple iPhone.

On sale in the iTunes store, the $99.99 app includes maps of the United States and Canada—versions for Western Europe and Australia are also available. The application includes IQ Routes, which factor in historical traffic data, a trip planner, a database of points of interest, and more.

As we’ve observed before, generally smaller screens and controls can make phones more difficult to use than dedicated GPS units, but there is an advantage to having one less device to carry around.

For more information on the TomTom iPhone app, see TomTom iPhone navigation app now available on Consumer Reports' Cars Blog. For help on choosing a dedicated handheld navigator, see our free GPS Buying Guide.

If you try the Tom Tom app, or any iPhone GPS app, let us (and the rest of the readers) know how it works for you.