Folders iOS 4
introduced folders, which can be created by dragging an application on top of another, and from then on, more items can be added to the folder using the same procedure. A title for the folder is automatically selected by the category
of applications inside, but the name can also be edited by the user When apps inside folders receive notification badges, the individual numbers of notifications are added up and the total number is displayed as a notification badge on
the folder itself Originally, folders on an iPhone could include up to 12 apps, while folders on iPad could include 20.
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With increasing display sizes on newer iPhone hardware, iOS 7 updated the folders with pages similar
to the home screen layout, allowing fora significant expansion of folder functionality. Each page of a folder can contain up to nine apps, and there can be 15
pages in total, allowing fora total of 135 apps in a single folder In iOS 9, Apple updated folder sizes for iPad hardware, allowing for 16
apps per page, still at 15 pages maximum, increasing the total to 240 apps.
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