If you own a smartphone such as the Apple iPhone, various Nokia models or the Galaxy S5 featured here (waterproof to 1m for 30 minutes) you can benefit from its built-in GPS receiver and just add mapping software. Viewranger software is free but you pay extra for OS mapping. Map pricing depends on coverage, but you can get OS 1:50,000 mapping for the whole of GB for £90 or bargain National Park packages for far less. Modern phones have sensational screens and when combined with Viewranger software and its ease of use you do have a superb navigational tool. Phones are not as durable as dedicated outdoor devices, so you’ll need something like an Aquapac or Ortlieb phone case to protect it. Stunning value if you already have a great phone, though.
Screen 11x6.5cm colour touch-screen
Battery life depends on set-up
Review by Graham Thompson
First published in Trail magazine October 2014