Follow along with the video below to see how to install our site as a web app on your home screen.
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Task killers will only save on battery life if you've got a badly behaved app. Most apps, when sitting in the background, use no cpu or network resources, and hence use no battery. Many of the apps and services running in the background are needed by other applications, and killing them will slow your phone down (because they need to be reloaded), or make it unstable.