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Running in background even when not active? (battery drain)

I am running the 3.0.1 version of Ambiance on my iPhone 4, and have noticed that it seems like Ambiance is still "running" in the background and eating up my battery life even when I am not playing a sound and when no alarm is activated. I charge my phone in the morning after using the alarm feature overnight. I turn the alarm off in the morning, but do NOT usually "close" the app (by pushing the home button twice to bring up most recently used apps and touching the minus sign to fully close it). A few hours after removing my phone from the charger, I notice that my battery has drained more than it should while in stand-by mode. Then I check my usage vs stand-by stats under my iphone Settings and I see that the two numbers are exactly the same, even though I haven't even touched my phone all morning. I've experimented by actually fully closing the Ambiance app (as described above) in the morning, and the battery life is much better and the usage stats are NOT the same as the stand-by stats in this case. So it really does seem to be the Ambiance app doing something in the background when it seems like it shouldn't be, that causes my battery drain problems. Is this something that can be fixed? I could make it a habit to fully close the app every morning, but it doesn't seem like I should have to do that.
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  • In order for Ambiance to run in the background we have to tell iOS 4 that we are an audio app and that the Operating system should handle us like one, allowing background audio. Aside from that, we don't handle any of the background optimizations. If you are not downloading, listening to audio or running an alarm, Ambiance is not doing any work. It is up to Apple to "hold" background apps and prevent this from happening. I think that as iOS matures a little, optimizations to the OS will be added to help with battery life while 3rd party apps are in the background.
    • I am running version 3.0.2 and believe this is a problem. Other audio apps don't seem to cause battery drain when they're not playing. Phone was on charger all night. Alarm went off. Battery was at 100% when I got up and disconnected phone from charger. 2 hours later (phone was sitting in standyby) battery was down to 93%. Shouldn't have been any app activity going on. Running iOS 4 on 3GS.
    • This comment was removed on 2010-09-07.
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  • Cometwoman - I would suggest making it a habit to fully close the app from the multitask bar each morning after you turn your alarm off. That's what I've been doing and it definitely does make a difference for me. It's kind of a pain to remember, but I get reminded quickly to do so if I notice my battery draining faster than it should in stand-by. This is the only app that I have to close like this in order to prevent battery drain. Even other audio apps don't seem to cause this issue.
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