Many people are now comfortable with the idea of using a satellite-navigation, or sat-nav, device for driving directions. Modern in-car sat-navs are convenient, reliable and – as long as you’re sensible enough to ignore erroneous suggestions to drive off cliffs – safe.
But one thing dedicated sat-nav devices are not is cheap. Along with the device itself, sat-nav manufacturers will try to sell you all manner of extras – from new maps to traffic alerts.
Alternatively, you could download a free sat-nav app for your smartphone. With a dashboard or windscreen bracket (buy one cheaply from eBay or Amazon), you could save a packet. But are these free-wheelers any good? Obviously voice directions are important, but what else should you look for? Will you get traffic alerts? European maps? Will you need a 3G data (mobile internet) connection? We took four popular options for a test drive.