We've all been using iPhones for a pretty long time now, and since the start we've all been told that if you double press the home button and swipe away all of our apps, it will save our phone's battery life as well as make our phone run super smooth.
Well, as it turns out, it doesn't… It does nothing really.
According to Apple Insider, the 'app switcher' does what it says on the tin – it makes it easier for you to go to one of your recently used apps.
And you can prove it all by rebooting your phone and then trying the trick again – your apps will still reopen even though your phone has just started up.
The only reason to swipe the app away is if it crashes or if it has problems.
So, there you go. We're not all iPhone geniuses afterall.