How to Monitor (and Control) App Data Usage on Your iPhone

Find out which apps are using the most cellular data on your iPhone

Co-authored by Megaera Lorenz, PhD Reviewed by Stan Kats

This wikiHow article teaches you how to check and monitor how much mobile data each app has used during your current or previous billing period.

Quick Steps

1
Open your iPhone's Settings. The icon looks like a set of grey cogs (
) and is located on the home screen.
- If you can't find it on the home screen, Settings may be located in the Utilities folder on the home screen or in your App Library.
2
Tap Cellular. It is located in the first group of menu options.^{[1]
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- This button may appear as Mobile Data if your phone's language is set to British English.
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3
Scroll down to the “Cellular Data” section. This will display your cellular data usage for the current billing period by default. If you want to see the data for the previous billing period, tap the Last Billing Period tab at the top of the list of apps.
- By default, the apps will be sorted by the amount of data usage. If you want to easily find a specific app in the list, tap Sort By Name at the top.
4
Review the data usage for each app. Each app will be listed with a number below its name. This is the amount of data each app has used since the start of your selected billing period.
- To reset these statistics, scroll down to the bottom of the Cellular menu and tap Reset Statistics.

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Tap the green switch next to an app to prevent that app from using the phone’s cellular data. The app will switch to using only Wi-Fi data.

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Tap System Services near the top of the list of apps to see how much cellular data iOS services are using.

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