Sometimes you just want to blow away all your app's defaults and return to the factory default settings. RooSwitch is a great way to do it for your app for testing or debugging. Or if you need to do it in code:NSUserDefaults *defs = [NSUserDefaults standardUserDefaults]; NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier]; [defs removePersistentDomainForName: appDomain];