closing multitasking apps necessary?

Discussion in 'iPhone' started by unlimitedx, Jul 7, 2010.

  1. unlimitedx macrumors 6502a

    Jun 15, 2010
    is it necessary to remove apps from the multitasking dock? that docks seems to contain every app i open..
    im wondering if anyone knows if it has an impact on battery life
  2. marksman macrumors 603


    Jun 4, 2007
    It is not a multi-tasking dock it is a fast task switching dock.

    Those programs are not in memory. Any background APIs will be denoted on the top of the screen.
  3. unlimitedx thread starter macrumors 6502a

    Jun 15, 2010
    That means if an app is running in the background there will be a symbol at the top? otherwise it is simply quick switching?
  4. mathcolo macrumors 6502a

    Sep 14, 2008
    Yeah. For example: An app like Skype, which can now run audio calls in the background, will have a little bar at the top of the screen just like when you go back to the home screen in the middle of a phone call.
  5. GoKyu macrumors 65816


    Feb 15, 2007
    New Orleans
    I don't think this is completely true - I stressed the phone a bit by running about 60 apps in that "multitask list", and out of those, about half of them had processes running when I checked iStat. Definitely ALL of the iPhone-native apps had background processes, and I guess also the ones which NEED to be running in the background, such as Skype or LogMeIn (as I was connected to my Mac at the time.)

    This isn't including the usual background apps required for the iPhone to operate, such as the Springboard and various daemons that have to run when the phone boots.

    Here's the screenshot I took at the time, showing the apps that had background processes going. Other than iStat and LogMeIn, I just ran the apps, and then went back to the home screen to launch more.

    The results were actually pretty good though - the phone definitely got a bit warm, but never got hot, and even running all of that, I still had 95 megs of RAM free, out of the available 512. The phone stayed very responsive, so I wouldn't worry too much about keeping a few extra apps open.

    Attached Files:

  6. Zaft macrumors 68040


    Jun 16, 2009
    Brooklyn, NY
    native apps run in the backround, even before IOS4.
    Unless its Mail thats not closed, i dont think it effects battery life.
    Mail keeps refreshing if left opened.
  7. celticpride678

    Feb 15, 2009
    Boston, MA
    This is compltley untrue. Barely any applications have some type of mark when running in the background.

    However, yes, that is a fast app switcher meaning that only applications that have the support for background API's will actually run on th background. According to Apple, you don't have to close anything in the switcher.
  8. bluenoise macrumors 6502a

    Jul 16, 2008
    I have one of the new free flashlight apps that uses the camera's LED. It stopped working when I'd bring it up, either through the switching or from the springboard. The only way to get it working again was to remove it from the fast switching.
  9. ajnicho macrumors 6502a

    Sep 24, 2008
    When did Skype update to allow background calling?
  10. gimmeaipod macrumors member

    Jun 2, 2010
    i had to close some gps apps manually. the location services arrow was still on top after pushing home
  11. Carniphage macrumors 68000


    Oct 29, 2006
    Sheffield, England
    Every app you open will appear in the dock. It's just a history list.
    Apps in that list can be in three different states:

    1) Completely dead and unloaded. These apps are not in memory. They have quit - but they remain in the bar. Pressing the icon will relaunch the app - exactly like selecting it from the main icon screen.

    2) In memory but not running. Modern compiled-for-iOS4 apps will remain in memory - and stay there until iOS4 boots them out. Pressing the icon will launch them and they will wake, carrying on from where they left-off with their state information preserved. Incidentally, selecting the icon from the main icon screen resumes them in exactly the same way.

    Such apps don't place any demand on your resources. No impact on battery life. There's no point in cleaning up. iOS will tidy up automatically.

    3) In memory but running in background. A handful of special case applications can run to a greater or lesser extent in the background. GPS navigation apps run all the time for example. It will be obvious which apps are doing this. Nav Apps, Streaming Audio etc.
    These apps do use some resources, and in these instance you may want to explicitly stop the application.


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