We have kill every process via pushing the screen with four fingers and tapping the app icons. But if you want to kill all the processes at one time, the utility app Process Killer should be able to catch your eyes.

Utility App Process Killer for iPhone, iPad and iPod Touch

Process Killer is simple but very practical utility app developed by Aeonika, and designed for both iPhone and iPad. The universal app features neat and intuitive user interface. The only one page shows you the status of the memory usage and the list of activating applications and games in order that you can intuitively know the memory consumption and background processes. Just pulling down the list and releasing, you can conveniently finish all the applications running in background.

Process Killer with a size of 0.6 MB is compatible with iPhone, iPod touch and iPad running iOS 3.0 or later. The universal app is free for a limited time at present. If you’re interested, jump to App Store for more details.