Idle apps and battery life?

Discussion in 'iPhone' started by manishans, May 2, 2016.

  1. manishans macrumors member

    Joined:
    Oct 5, 2013
    #1
    Hi everyone!

    Does the battery life get effected by the # of apps you have installed? opened or otherwise?

    I have about 15-20 apps which I have installed but rarely use them. I don't even have them open most of the time, its just there installed and when I get free time I run few of those apps. Its very rare, maybe once a month.

    Does this effect the stand by time or on screen time?
     
  2. C DM macrumors Westmere

    Joined:
    Oct 17, 2011
    #2
    Running apps are what affect battery life. Apps you haven't opened aren't running, and most apps that you have opened but left and haven't used in a bit aren't running either in general.
     
  3. Newtons Apple macrumors Pentium

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #3
    There are some apps that even when not using them will use lots of battery because it is constantly working in the background. Social media apps like Facebook as some of the most popular battery users. If you set them up correctly they can only "sip" on the battery but let Facebook have all the defaults and it will use a lot of power.
     
  4. C DM macrumors Westmere

    Joined:
    Oct 17, 2011
    #4
    But even in those cases it wouldn't really be simply from having those apps, they would have to have been opened at some point to be able to stay in the background and use up resources.
     
  5. manishans thread starter macrumors member

    Joined:
    Oct 5, 2013
    #5
    What if these apps were never opened after installing them? If so it shouldn't effect the battery life?
     
  6. vault, May 2, 2016
    Last edited: May 2, 2016

    vault macrumors regular

    Joined:
    May 3, 2009
    #6
    Idle apps do not consume battery, obviously, and background apps are suspended after three minutes. They may be waking up periodically to refresh data if you have "Background App Refresh" enabled in Settings. Some apps do register in Apple Push Notification Service, though, so they can continue to function sort-of "in the Cloud". Your device maintains a constant connection to this APNS (in fact it is the only connection that can remain active). Notifications travel over this channel and it is this activity that can drain your battery.

    Suppose you launch Skype and log on. It registers in APNS and goes to sleep shortly afterwards, it does not need to run in the background and does not stay connected to Skype server directly. When you receive a Skype call - the APNS sends you a Push notification (that you see on your screen) and if you answer it, Skype is woken up and connects to its server as you'd normally expect it to.

    This is how iOS "multitasking" works in a nutshell.

    In addition, there are certain APIs that allow apps to tap into system services for playing music in the background or downloading files, but these are very limited.
     
  7. manishans thread starter macrumors member

    Joined:
    Oct 5, 2013
    #7
    Thanks for the great info.
     
  8. C DM macrumors Westmere

    Joined:
    Oct 17, 2011
    #8
    Well, seems like I addressed the part about apps that haven't been opened.
     

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