by Walter S. Mossberg

MotionX-GPS Drive: Of all the apps, this one looks and works most like a typical iPhone app, and least like a navigation program ported from another device. Its main screen has a clever menu arranged in a circle. It’s also fairly small—just 10 megabytes or so. But it must download maps and other info each time you start a route. This also allows it to update the information on the fly. Drive also is potentially the cheapest of the four apps I tested. It will cost $2.99 and included is 30-days of Live Voice Guidance. After that, it’s $25 a year.

This app worked well in my tests, and is packed with features, including live traffic, a route summary, and integrated music control. It understood my D.C. test address, but it doesn’t announce street names, and its function buttons are very small and labeled with tiny type.

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