Apple promised better battery life with the iPhone 4 but let’s face it, it still falls short. But then again, depending on how you use it, a full charge can last anywhere from just a few hours to a couple of days (I’m being very generous). I’ll admit I’m a heavy iPhone user. It’s useful and I like it and being a heavy iPhone user obviously taxes the battery. I run very few things in the background to conserve battery life but I want more conservation.

ScreenDimmer is an application that helps conserve your device’s battery by dimming the screen and turning off the backlight. I lock my phone after 5 minutes but I don’t like my screen staying on for that long so being able to set ScreenDimmer to turn off backlight after 2 or 3 minutes is pretty cool. Tapping the screen after the backlight is turned off and before the device locks turns the backlight back on.


ScreenDimmer allows you to save battery life by automatically dimming your device’s screen and turning off device’s backlight after a pre-defined time.

Not only does ScreenDimmer allow you to fine tune your screen light, there are options to prevent the device from sleeping while plugged in, prevent device from locking after restarting springboard and to dim while charging.

ScreenDimmer supports the iPhone, iPad and iPod on iPhoneOS/iOS 3.x or newer and is available in the Cydia Store for $1.99. Personally, I think this is a good investment as I have found to have increased battery life. How much? It’s hard to say. I think that will vary between devices, users and usage.

Thinking about trying it? Let us know what you think.

  • Dadditude

    I’ve been using it for a few days now, and it is great.

  • Oh man I would buy 4 sure if my ip4 was able to be jb’d. Wish was in iTunes store/would buy there 4 sure!

  • appletiser

    if the stupid built in light sensor worked properly in the first place, dimming the screen instead of just brightening, there might’ve been less of a need for this (:

  • Z

    The only useful feature is disabling phone locking after respring. Useless to me.

  • James

    Auto 3G helps a lot more. Its a bit pricier, but worth it I think. Leaves the phone in Edge during standby, and turns on 3G when phone is in use. I’ve been happy with it.

  • Rick

    Your blog is the shnizle!.. (which is good in case you were wondering!)

  • roy

    great app 🙂

  • amins

    I have done all doesnt work on my phone…please let me know what I am missing

    iphone 3GS, 4.0.1

  • R. Blake Kessler

    Works fine on my iPhone 5 (iOS 7) even though AutoDimWithoutLock doesn’t work at all. Well worth the $2.19.