The appy wanderer: smartphone walking in our cities’ green spaces Go Jauntly is a new walking app that uses photographs rather than maps to guide users on routes around woods and byways. We put it to the test in south London  King of the castle … a Go Jauntly walk in Sydenham Woods, south London, is popular with young hikers, too The business of social walking is setting off into a largely unexplored area of navigation. A community-based group in…