How to Check What Apps are Using the Most Data on iPhone

If you have a limited data plan for your iPhone, it’s a good idea to keep an eye on where that data is going. If you find out that an app is sucking your data, you can turn off Cellular Data usage for it, which means you’ll only be able to access the app over Wi-Fi. If you have unlimited data, it’s not a big deal. But if you’re trying to stay within a certain amount of gigabytes each month, this tip will make it easy. Here’s how to check what apps are using the most data on your iPhone.

Related: Forgot Your Restrictions Passcode? How to Reset It Without Restoring Your iPhone or iPad

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How to Check What Apps are Using the Most Data on iPhone

  • Open the Settings app.

  • Tap Cellular.

  • Scroll down to Use Cellular Data For:

  • Each app you have will be listed, and below the name of the app, you’ll see how much data it’s used.

  • For example, you can see that I’ve used 1.0 GB of my data on Facebook.  But I don’t want to waste my data on Facebook. So I’m going to toggle off the button next to it.

  • Now, when I try to use Facebook outside of Wi-Fi, my iPhone will let me know it can’t because I have cellular turned off for the app.

  • Follow this process to selectively turn cellular data off for apps that you don’t want using cellular data.

If you are concerned about data usage, it's a good idea to toggle off any apps that you don't absolutely need to access while you're out and about. If you spend most of the day in Wi-Fi, that could be every app except weather, navigation, and fitness-tracking apps. You can always restore an app's cellular access temporarily or permanently if you find yourself wanting to use it away from Wi-Fi.

Cellular Data Usage will show you how much data you've used in a given time period. This information does not reset automatically; if you want to keep track of this in order to prevent data overages, it's a good idea to set a monthly reminder to manually reset your data usage statistics on the first day of your billing cycle. You can reset the statistics by scrolling down to the bottom of the screen and tapping Reset Statistics.

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Sarah Kingsbury is the Senior Web Editor of iPhone Life magazine. Previously she wrote for and was the Associate Editor of the Iowa Source for many years.