I have an iPhone 5c with the newest iOS, 9.3.2. Every time I try to download an app or an update, the loading icon shows up. Immediately after that, it goes back to the download or update icon, without doing the download. Resetting the iPhone in all ways doesn't work. Please help, I've tried almost everything.
First I'd suggest you to try perhaps thru an alternate internet connection.
If that doesn't resolve the issue I'd suggest you the following since you're stating that this happens every time you try to download an app or an update then I assume that this happens by every app and resetting your iPhone doesn't either work then I'd suggest you to try signing out of the App Store then restart your iPhone and sign into the App Store and try again to download.