If you want to know how much storage space is being used by apps within folders on your Home screen in iOS 10 then new Cydia tweak called FolderUsage will do it for you. Normally you have to manually go to the Settings-General-Storage to see the usage taken by the apps. But you are lucky if you’re device is jailbroken, as you can use FolderUsage tweak to check the info within the folder it one tap.
FolderUsage can be downloaded from Cydia’s BigBoss repo for free. The tweak supports all jailbroken iOS 8, 9 and 10 devices. The tweak starts to work immediately after installation. So all you have to do to check how much storage space is being used by apps within folder on your iPhone's Home screen is to use a simple swipe-up gesture on any of your folder icons. You'll see a pop-up message that will show the storage space being occupied by all of the apps contained within the particular folder.
FolderUsage tweak allows you to see a report of how much space a specific group of apps is using on your jailbroken iPhone. This works differently from the storage space usage page in the Settings app, which only breaks things down on a per-app basis, rather than a per-folder basis.
The tweak can be useful when you’re trying to keep track of how much storage space you’re dedicating to certain app archetypes. Let's take games as the example. Since many iPhone users tend to put all of their games into folders. In such case FolderUsage will help to keep track of how much space is being used for games alone.
FolderUsage is really simple tweak with no configurations but if you want to quickly check how much storage space is being used by app within folder on iPhone then this tweak will come in handy.