Unlike streaming a video, which buffers, an app download needs a consistent handshake with Apple's servers. This is often overlooked but is a surprisingly common fix.
Public Wi-Fi Restrictions Blocking App Downloads
Verify Your Apple ID and Settings If the network is solid, the next place to look is your Apple ID settings. Getting a message that your iPhone won't download apps can be frustrating, especially when you are trying to install something important.
If your iPhone won't download apps, you might be running a version with a bug that Apple has since patched. If you see apps labeled with a gray "x," they have been offloaded.
Public Wi-Fi Networks Blocking App Store Access
If you are using public Wi-Fi, the network might have a web portal or restrictions that block App Store access. Storage Space and Offloading Your iPhone needs sufficient free space to stage and install an app.
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