Q: Is there a way to close all open applications at one shot?

Restarting/resetting the phone will.

Jedi_durg wrote:

 

Why does apple does not make a app button to kill all open apps at one shot or may be periodically ?

I assume by "open" you mean the apps in the Recents tray. Most of those apps are doing absolutely nothing. There is no need to "kill" them. See this article for further information:

http://support.apple.com/kb/HT4211

In my experience, an excessive number of apps, or even certain apps, continue to draw battery power at a higher than expected rate, even while 'dormant'.  It's not like it kills the battery in an hour or anything, but it's definitely noticeable. 

No, as Meg outlined.

It's a myth.

I have 80 apps on my multitask-bar and I don't have that "noticable while dormant" battery problem. I charge every second day. I have over 400 3rd party apps on my iPhone.

apps like gps apps can cause problems using up battery life if not closed

Not sure who to believe; my own experiences (where I've actually tested out my theory), or you guys.

Sorry, going with Ocean on this one.  I know for a fact that I've sen shorter battery life with certain apps running, like Pandora.  I'm sure that some apps have very little or no effect, and other apps have a noticeable effect.  Might have to do with some apps using location services as well, so it's an 'indirect' effect, so to speak.

for Ios versions less that 7, most of the apps are only storing their current state and the list you see is a list of recently used apps, not open ones. so you will not be closing them in any case, you'll simply be clearing their active state.

only a few 3rd party apps like ones using music, gps or dropbox like upload will continue to work in the background, but with limits on bandwidth, cpu usage and time.

now you're right in the sense apple could have designed it such that we are given a button to close all apps that are currently actively using cpu or memory resources. (so actually running). However, its not in apple's dna to provide fine grain control to end users.

I have a gps app called called MetroView and if I leave that in the mulitasking bar and it is runnind my phone is flat in about 3 hours.  IF I close that app.  My phone runs for the length of time that ckuan says.  View details of that app in app store and read under "Please note" in the info on the app.

Message was edited by: Ocean20

I just close out apps when I feel like it.  It's not that big of a deal, especially since I usually have my phone charging except when I'm physically away from my car or house or work.  So, basically out shopping or at the gym.  Otherwise, I keep it charging.

I have a gps app called called MetroView and if I leave that in the mulitasking bar and it is runnind my phone is flat in about 3 hours.

Me too, I only will run MetroView on a cigarette lighter charger in my car and a pretty mount on my window. Nice app that also warns about school zones and candid cameras.

Ditto.  It is a great app.  When I run it in my car I use the Cigarette charger too.  I always close that app when I am done.  It has a nice racing car marker that shows where I am and makes me feel like I am driving real fast.

I missed the German Autobahn as well.

Ocean20 wrote:

 

I have a gps app called called MetroView and if I leave that in the mulitasking bar and it is runnind my phone is flat in about 3 hours.  IF I close that app.  My phone runs for the length of time that ckuan says.  View details of that app in app store and read under "Please note" in the info on the app.

There are certainly apps, generally navigation apps,  that do run in the back ground. Apps like Apple Maps specfically have a function to end navigation so that it's not an issue. As a rule, however, there is no need to remoe apps from the recents tray. The last time I counted, I had about 80.