You’ve updated to iOS 7 iPhone 5s or 5c and you can’t figure out how to close all those apps you’ve launched.
In iOS 6 and previous versions you had to double-tap the Home button to show the tray containing all the apps which were running in the background, using up all the smartphone or tablet’s precious resources (particularly RAM). You’d then tap and hold any one of them to make them all wiggle, and press the red cross to close the app.
It was never a good system, and most people didn’t realise you didn’t actually have to tap the ‘x’ – pressing anywhere on the icon would close the app.
In iOS 7, reviewed, you still double-tap the Home button to bring up the list of running apps, but it’s now a full-screen affair, no matter whether you’re using an iPhone, iPod touch or iPad.