iPhone side button not working for app downloads

Hello! I understand this could be frustrating! When you are prompted to double click, it is a method of verification to complete the purchase you are attempting to make, there are different parameters of verification, it may be Face ID, Apple ID password or device password. Restart your device and try again, when double-clicking pay attention to the bottom of the screen for the method of verification.

For more info:Download apps and games on your iPhone or iPad - Apple Support

Hope that helps,

Adin

"iPhone side button not working for app downloads: Whenever I try to download any app and I get the prompt to double click on the side button nothing happens. I keep trying but it keeps doing the same thing."

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If an App Won't Respond:

Save what need be, and then Force Restart your iPhone. Go here: Force Restart iPhone - Apple Support