John Gruber on not force quitting iOS apps.

The single biggest misconception about iOS is that it’s good digital hygiene to force quit apps that you aren’t using. The idea is that apps in the background are locking up unnecessary RAM and consuming unnecessary CPU cycles, thus hurting performance and wasting battery life.

This has been a bugbear of mine for many years,  I see people doing it all the time and have overheard people being advised to do it in Apple Stores by employees. You really shouldn’t, it’s completely unnecessary unless an app is misbehaving. What’s worse is that it actually decreases battery life, the complete opposite of what people are trying to achieve.