How to Check the Size of Apps on Your iPhone

how to check iPhone app size
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The iPhone and iPod touch offer a lot of space to store your music, movies, photos, and apps, but storage isn't unlimited. Packing your device full of the stuff that makes it so useful and fun means you can run out of space fast. This is especially true if you have an iPhone with just 16GB or 32GB of storage. After the operating system and built-in apps, those models don't have much room for you to use.

A quick way to free up storage space on your device is to delete apps. When you need to squeeze a little more storage out of your device, knowing the size of each iPhone app helps you decide which app to delete (this raises an important question: Can You Delete the Apps That Come With the iPhone?). There are two ways to find out how much storage space an app uses: one on the iPhone itself, the other in iTunes.

Find iPhone App Size on the iPhone or iPod touch

Checking how much space an app takes up directly on your iPhone is more accurate because the true size of an app isn't just the app itself. Apps also have preferences, saved files, and other data. This means that an app that is 10MB when you download it from the App Store can become many times larger after you start using it. You can only tell how much space those extra files need by checking on your device. 

To find out exactly how much storage space an app requires on your iPhone:

  1. Tap the Settings app.
  2. Tap General.
  3. Tap iPhone Storage (this is on iOS 11; on older versions of the iOS look for Storage & iCloud Usage).
  4. At the top of the screen, there's an overview of the storage used and available on your device. Beneath it, a progress wheel spins for a moment. Wait for it. When it's done, you'll see a list of all your apps, starting with the ones that use the most data (on older versions of the iOS, you'll need to tap Manage Storage to see this list).
  1. This list shows the total space used by the app—all the storage used by the app and its associated files. To get a more detailed breakdown, tap the name of an app you're interested in.
  2. On this screen, the App Size is listed at the top of the screen, near the app icon. This is the amount of space the app itself takes up. Beneath that is Documents & Data, which is the space used by all the saved files created when you use the app.
  3. If this is an app from the App Store, you can tap Delete App here to delete the app and all its data. You can always redownload apps from your iCloud account, but you may lose your saved data, so make sure you're certain you want to do this.
  4. Another option available on iOS 11 and up is Offload App. If you tap that, the app will be deleted from your device, but not its Documents & Data. This means you can save the space needed for the app itself without losing all the content you may have created with the app. If you re-install the app later, all of that data will be waiting for you.

Find iPhone App Size Using iTunes

NOTE: As of iTunes 12.7, apps are no longer part of iTunes. That means that these steps aren't possible anymore. But, if you have an earlier version of iTunes, they still work.

Using iTunes only tells you the size of the app itself, not all of its related files, so it's less accurate. That said, you can use iTunes to get an iPhone app's size by doing this:

  1. Launch iTunes.
  2. Select the Apps menu in the top left corner, under the playback controls.
  3. You'll see a list of all the apps you've downloaded from the App Store or otherwise installed.
  4. There are three ways to find out how much disk space each app uses:

    1. Right click on the app and choose Get Info from the pop-up menu.
    2. Left click the app icon once then press the keys Command+I on Mac or Control+I on Windows.
    3. Left click the app icon once and then go to the File menu and choose Get Info.
  1. When you do this, a window pop ups showing you information about the app. Click the File tab and look for the Size field to see how much space that app requires.

Advanced Topics

All of this talk of running out of memory space on your iPhone may have you wanting to learn more about dealing with storage and how to handle it when you don't have enough. If so, here are articles on two of the most common such scenarios:

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