This app can be found on the Google Play Store here for Android devices, and on the Apple App Store here for iOS devices.

It offers features such as:

• Free Worldwide Maps: Street maps, aerial and satellite imagery, and terrain maps.
• Premium Maps: Upgrade to see terrain and trail details other maps miss. Download Great Britain Ordnance Survey® Explorer 1:25,000 & Landranger 1:50,000 maps.
• The app uses your device's GPS, and does not need data or mobile signal to locate you on a map, record your track, or follow a route. Simply, save the maps you need for your trip on your phone before you leave home.

 For further details please visit the ViewRanger web site here.