Your iPhone has been slowing down. Apps take forever to load, Safari gets glitchy, and you keep getting that annoying storage warning. The culprit is often cached data — temporary files that apps store to load things faster but that pile up over time. Here is exactly how to clear cache on your iPhone to reclaim storage and get things running smoothly again.
What Is Cache on an iPhone?
Cache is temporary data that apps store on your device so they can load content faster. Safari caches websites, apps cache images and data. Over weeks and months, this cached data can consume several gigabytes of storage.
How to Clear Safari Cache on iPhone
- Open Settings.
- Scroll down and tap Safari.
- Tap Clear History and Website Data.
- Confirm by tapping Clear History and Data.
This removes browsing history, cookies, and cached data. You stay logged into most apps but get logged out of websites in Safari.
How to Clear App Cache on iPhone
Method 1: Offload Apps (Recommended)
- Open Settings > General > iPhone Storage.
- Find the app taking up the most space.
- Tap Offload App and confirm.
- Re-download from the App Store when needed — your data is preserved.
Method 2: Delete and Reinstall
- Long-press the app icon on your home screen.
- Tap Remove App > Delete App.
- Re-download from the App Store.
Warning: This deletes all app data including logins and downloads.
Method 3: Clear Cache Within Apps
- Chrome: three dots > Settings > Privacy > Clear Browsing Data
- Spotify: Settings > Storage > Clear Cache
- TikTok: Profile > Settings and Privacy > Free up space
- Discord: Settings > Advanced > Clear Cache
How to Clear System Cache
Restart your iPhone: Hold Side Button + Volume Up, slide to power off, wait 30 seconds, hold Side Button to turn on.
Update iOS: Settings > General > Software Update — updates often include storage optimization.
How Much Storage Can You Reclaim?
- Safari cache: 500 MB – 2 GB
- App caches: 1 – 5 GB
- System cache: 200 MB – 1 GB
- Total potential savings: 2 – 8 GB
Tips to Prevent Cache Buildup
- Clear Safari cache monthly
- Enable Offload Unused Apps in iPhone Storage settings
- Delete old message attachments — set messages to auto-delete after 30 days
- Review and delete old screenshots and duplicates in Photos
- Use iCloud to offload full-resolution photos
Frequently Asked Questions
Will clearing cache delete my photos?
No. Your photos, contacts, messages, and documents are completely safe.
Will I lose my passwords?
Clearing Safari cache logs you out of websites but saved passwords in iCloud Keychain remain.
How often should I clear cache?
Once a month is plenty. Every two weeks if you have a 64 GB model.