iosios-appstoreipad
My iPad has just been updated to iOS 11. The new app store doesn’t seem to show the download size of each update any more.
As you can see in iOS 10, the size is really easy to spot in both the list and details view.
How can I find out the size of the updates so I don’t use too much data?
When iOS is updated, an .ipsw file that is downloaded from Apple's servers by iTunes. You can find direct links to them at iDownloadBlog.
At your parents' house, to update iOS, plug their iPad into a computer and launch iTunes. Then click it in the left sidebar and hold down the ⇑ Shift key while clicking on the Restore button. This brings up an open file dialog; simply look for the .ipsw file you downloaded and open it.
iTunes will tell you that the iPad will be wiped and restored, just click OK and give it time to update. You'll be asked whether you want to start again or restore from a backup when the process finishes; choose the newest backup and the previous data on the device will be loaded back on.
The size is normally the size of the full application. What I do is I open the application info screen and look at the file size. Remember, App Store updates are full versions of the file being downloaded, and the existing one replaced.
There is unfortunately no way to do this quickly, you have to check each application individually from the update screen by tapping on its icon.
As pointed out by @cksum, when finding the app on the iPhone, scroll to the bottom and it will show the size.
Best Answer
You will need to click each app icon to get to the full description, then scroll down to where it shows the size.