People complained of the various problems that came with the iOS 9. And while most of the bugs hinder doing tasks, there is one that can help resolve the home screen clutter that a lot of users have.
"Folders" in iOS are great for keeping things organized on the home screen. It's a good way to hide the unused preinstalled apps, as well as other bloatware, that come with the device. An even better way of organizing is through nested folders, which is basically placing folders within other folders. However, nested folders are not supported nor advertised by Apple and hence, it's more of a glitch than a feature.
Note that this is not native to iOS 9 and the steps for each iOS version vary. Videos detailing the steps on how to create nested folders for iOS 6 up to iOS 8 are littered across the Internet, particularly on YouTube.
There are a couple of ways to embed a folder inside another in iOS 9. The first is quite simple and was detailed in a video uploaded by videosdebarraquito, a YouTube Channel.
To make things clear, a couple of terms need to be defined first. The "main folder" is the folder where the other folders will be put in. The "sub-folder" refers to the folder that will be placed into the main folder. With that explained, proceed with the listed steps below.
1. Create a folder that will be used as the main folder.
2. Place the main folder near the top banner after the icons start to wiggle. It can be on any column as long as it is in the first row of apps, just below the top banner.
3. Press and hold the folder you want to place inside the main folder until the icons start to wiggle, which is a sign that it is on editing mode.
4. Repeatedly tap the space between the top banner and the main folder while continuing to hold down the sub-folder. This will open the main folder.
5. Once the main folder is open, drop the sub-folder into it.
6. Tap just below the main folder to go back to the still-wiggling home screen icons.
7. Repeat steps 4 and 5 to add more sub-folders into the main folder.
The second method is easier to understand if observed with a video demonstration that you can see below. For both methods, the home screen will revert back to how it was and remove the nested folders after restarting.