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

Mobile World Congress – five of the most eye-catching innovations

Around 2,000 companies have flocked to Barcelona to show off their new wares, from iris-recognition phones to sat navs for cyclists or furniture that charges your device