When I’m looking at trail length and estimating the time for a hike I’ve never done before, the iOS app Terrain Radar can prove to be pretty handy. I often forget to calculate altitude change when I go on short hikes and my guesstimate “oh this will only be a couple hours” can sometimes turn into a tiring afternoon. Terrain Radar can eliminate some of that by quickly visualizing the landscape ahead of you. Its simplistic layout and operation make it quick and easy to see what’s ahead. By pointing your phone in the direction you are headed, the app instantly creates a graphical representation of the terrain ahead. The current latitude and a traditional map of your surroundings are also displayed on the bottom half. A laser is depicted crossing the map to represent the section of data in the graph. You can adjust the distance measured up to 2,500ft with the free version and up to 17,000ft with the paid version for $1.99. The only problem us that I believe you need data for it to work. At least check out the free version, it’s a cool concept and fun app play around with.