The primary reasons why an iPhone might not download apps include insufficient storage space, internet connection issues, restrictions in settings, outdated iOS, or issues with the Apple ID/payment method. Specific causes and fixes include:
- Check iPhone storage in Settings > General > iPhone Storage. If space is low, free up storage.
- Use Wi-Fi for downloads larger than 200 MB; cellular data has download size limits.
- Check for any Screen Time or content restrictions that block app installations.
- Restart the App Store app or the iPhone to fix temporary glitches.
- Ensure your Apple ID has a valid payment method even for free apps.
- Verify Date & Time settings are set automatically.
- Update iOS to the latest version.
- Reset network settings if there are connectivity problems.
- Sign out of the App Store and sign back in to refresh account connection.
These are the most common and effective steps to resolve iPhone app download issues.