There's plenty of apps available that utilise the Apple iPhone's GPS to pinpoint the user's location and then offer audio and visual navigation on the handset for a fraction of the cost. Some of them are even free, so we've rounded up our five favourite free Sat Nav iPhone apps.
Skobbler UK/Ireland Lite
Skobbler utilises OpenStreetMap (OSM), a Wikipedia of free maps that's updated by around 250,000 users. As well as offering turn-by turn visual and audio navigation, the app also encourages users to make corrections and update the maps, to make "outdated and poorly detailed maps a thing of the past". The only snag is that this free version of Skobbler is supported by adverts.
NavFree GPS UK & ROI
This free app offers turn-by-turn navigation through audio and on-screen instructions, along with offline map access and live search from Microsoft Bing and Google. Like Skobbler, the maps are provided by OpenStreetMap.org.
Originally launched for Windows Phone, a version of Global Navigator has now been made available for iPhone users. Utilising Google Maps, the app provides turn-by-turn audio and visual navigation that covers 193 countries and 20 different languages.
Utilising information from OpenCycleMaps, the app helps cyclists map their perfect route using cycle paths and low-intensity roads, rather than traditional car routes provided by other Sat Nav apps. Cycle Maps also uses a handset's GPS to track the user's location and update them on their progress.
Heads Up Navigation
When you're a pedestrian, it can be difficult to work out which way you're facing on a map. However, this app utilises your iPhone's camera to provide a real-time view of your surroundings and then overlaying floating 3D labels, so you can follow directions easily.