What? No, no "app" can extend the iPhone's battery life, no matter what they say do not buy them. They are simply resources for "tips" to extending the battery life, which you most likely already know (i.e. turning off 3G, auto-lock the screen, etc.). It's not rocket science and none of them have the ability to actually extend the battery life. It's a horrible scam and Apple should remove all of these apps.
05-21-2010 02:22 AM