Group test: 8 satnavs and GPS smartphones

game, for example. However, there are also some good-looking mapping apps for those with the tendency to get lost. Here's one we really like.

GPS Trails

* £2.99 inc VAT

* Get via iTunes App Store

GPS Trails on the iPhone caught our eye and was recommended by several iPhone-owning friends. It's able to show you your current location and where you've been, but is also able to log and export that information so it can be plotted on a PC or Mac.

Similarly, it can be used to import routes and can even tag photos so you can log where they were taken (although the Apple iPhone 3GS itself can now do this, after a fashion).

What's more, one reviewer found it noticeably more accurate than a standalone satnav device in terms of pinpointing where you've been. It works as a timekeeper too: add a route and set off and it will begin timing you as well as showing the distance you've been. Waypoints, elevations and pace are all logged along with the start and finish time -- great if you need to work out a more efficient time of day to travel by bike or foot.

Verdict: GPS Trails shows what's possible with GPS and the iPhone. It's a rock-solid, supremely crafted app with detail aplenty, but it still maintains the clean interface for which the iPhone is famous.

Given the size of the screen and the volume that the 3G version of the iPhone kicks out, we don't think you'll have trouble making out which direction your future satnav is telling you to take, either.