Forget Googlemaps, Citymapper is the ultimate transport app for London. It's easy to use, utterly comprehensive and a lifesaver when you're out late and unsure of how to get home. Essential for Londoners.
Who needs a personal trainer when you've got a smartphone? Getting fit doesn't seem so impossible when you can track your progress. Use the GPS in your phone to monitor runs, bike rides and hikes.
Post-its and scrawled to-do lists are a thing of the past. Evernote aids memory and productivity by helping you create lists, voice memos and to-do lists. And everything is recorded in a super-useful searchable format.
If you're out and about and you hear an unfamiliar song you like, just hold Shazam up to the speakers and it'll send you back the name of a track. No longer will you have to suffer the embarrassment of asking.
Sky Guide £1.49
This guide to the night sky is beautifully presented and easy to use. All you have to do is hold it up and it recognises the particular segment of sky that it's facing.