Often, the problem is related to your network connection or a simple setting that has been adjusted inadvertently. To allow automatic offloading, go to Settings > App Store and toggle "Offload Unused Apps.
Fix Date and Time Settings to Resolve App Download Issues
Date and Time Settings An incorrect date and time setting on your phone can disrupt the SSL certificate verification process. Unlike streaming a video, which buffers, an app download needs a consistent handshake with Apple's servers.
Check Your Network Connection A weak or unstable internet connection is the most common reason why your iPhone won't download apps. It is possible that "Installing Apps" is turned off under "Allowed Apps," which would prevent any new installation regardless of the network quality.
Fix Date and Time Settings to Enable App Downloads
Since App Store connections rely on secure HTTPS protocols, a mismatch here can cause the download to fail silently. If prompted, sign out and then sign back in using your correct credentials.
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