It’s easy to mock Apple – and I do – but the App Store’s had an enormous effect on software. So when I say app-y birthday, I mean it.

Being able to pick up apps for a few quid here, a few pence there encourages us to experiment, to forget our favourites when something brighter and better comes along – and that in turn means developers are constantly under pressure to raise their game, to create even better applications. Software hasn’t been this exciting since the online shareware explosion of the nineties.