So iPhone changed it all again! If you're confuse with how you end an app running in the background, here's how you do it.
Please note that this will only work on iOS7.
How to end or kill running apps on iPhone (4, 4S, 5, 5S)
- Double tap the "home" button
- Swipe up the windows or apps you want to close
- That's it!
Here's a video: