If you need to know how to hide an app on iphone using folders then you can apply given mentioned steps:

Go to the Home screen on you iphone
Tap and hold any app which you want to hide
Next, select edit home screen
Then tap and hold the app and drag it on the another app
Then, Opne the folder
After that drag the app to the right to create a new folder
Then tap any blank area on your screen and tap done.

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