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The current Carat is unable to access the information it needs on iOS9. Previous iOS versions work fine. We are working on this and the new version will resolve this issue and feature a completely reworked user interface and many exciting new features we have been cooking in the lab.


Carat is the first app to generate personalized recommendations for improving your battery life. After observing your use of the device for *a week or more*, it will start to generate reports just for you. You should open the app once every day or so, with an Internet connection turned on, until you start seeing results.

Although Carat uses Location Services (thus displaying the little icon), it is NOT using your GPS and is NOT running in the background. The app uses almost no power.

** Thank you! **

Ever wondered why your battery is draining so quickly? Just install Carat, open it every few days with an Internet connection turned on so it can send data to our servers, and within a week Carat will start recommending Actions (just for you!) and even predicting the improvements you will see. Although Carat cannot measure energy use directly, it infers what apps are responsible using advanced machine learning methods.

And it's free!

As you use your device, Carat occasionally takes measurements and sends them to our backend servers in the cloud, where we apply cutting-edge algorithms to determine what steps you can take to use less energy. By collecting snippets of non-personal data from a large number of devices, Carat does not need to run continuously in the background. Nothing we collect identifies you, personally.

Carat will tell you which apps it thinks are hogs (they use a lot of battery) and which are bugs (they use a lot of battery on your device but not most others). Being a hog or a bug does not make an app 'bad', but a user trying to improve their battery life can use these designations to adjust their behavior.

== Carat Features ==

- Action List telling you how to improve your battery life and by how much
- Device information detailing exactly what data we are recording
- Reports apps that are using lots of energy and whether that is happening on other devices, too
- Detail views let you dive down into the data
- Low-overhead sampling requires almost no energy or CPU
- J-Score tells you how your battery efficiency compares to other users
- Sharing features let you post/tweet/blog about your experience; more users means more data which means better recommendations for you

Carat is under active development by a team of researchers in University of Helsinki. We are constantly making improvements, adding features, and giving you more knowledge about how your device is using energy. Remember, knowledge is power!

What's New in Version 1.15

-In-app feedback system
-In-app settings (WiFi only setting)
-UI fix for processlist for iOS 6+


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Customer Reviews

Broken under iOS 9

Not the fault of Carat but Apple decided that apps no longer get to have access to process info under iOS 9, and so Carat is finished unless they find some kind of workaround. If you have iOS 8.x, you should be okay but all my iDevices are on iOS 9 - it was a nice ride Carat and I’ll continue to use you on my Nexus 6. Bye!

Does Nothing

I have an iPhone 4s. I did have iOS 8 and now I have iOS 9.0.2. I've used this app for three weeks. It says to open it at least once a day. I opened it about seven or eight times a day. It has a hog report and a bug report. Despite its sending thousands and thousands of reports to its database, it says it has nothing to report. Therefore, it's worthless!

Come on Apple... Let Carat work again!!!

Carat was one of my fav's. Can't work anymore cuz of Mama Apple restrictions.
Either let it work or remove it from the App Store

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This app is designed for both iPhone and iPad
  • Free
  • Category: Utilities
  • Updated:
  • Version: 1.15
  • Size: 8.2 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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