CoPilot’s creator specialises in making sat-nav software for smartphones, with no in-car unit to compete.

Unlike Navigon and TomTom, CoPilot’s safety features (such as speed camera warnings) are an optional extra that’s not available yet, but the interface has the most finger-friendly icons of the lot.

The first-person map is the hardest to follow, but small-screen-friendly gimmicks such as displaying large text instructions before a turn keep you on the right track.

Stuff says... 

CoPilot Live 8 for iPhone review

Not the easiest map to follow, but full of innovation and superbly priced