Your iPhone feels slower than it used to. Safari is not loading pages properly. An app keeps crashing or behaving strangely after an update. Your iPhone storage full warning keeps appearing even though you have not downloaded anything new. These are classic signs of cache buildup — and clearing it takes less than two minutes once you know where to look.
The tricky part is that the iPhone does not have a single “Clear All Cache” button. Different apps store cache in different places, and you have to clear them separately. After testing on iPhone 13, 14, and 15 running iOS 16, 17, and 18, here is exactly How to Clear Cache on iPhone — for Safari, individual apps, and the system itself.
How do you clear cache on iPhone?
To clear Safari cache, go to Settings, Safari, and tap Clear History and Website Data. To clear an individual app’s cache, go to Settings, General, iPhone Storage, select the app, and tap Offload App. iPhone does not have a single button to clear all app caches at once — each app must be cleared separately or offloaded through storage settings.
What Is Cache and Why Should You Clear It
Cache is temporary data that apps and browsers store to load faster. When you visit a website, Safari saves images and code locally so the page loads quicker next time. When you use an app, it stores data to avoid redownloading the same information repeatedly.
Over time, cache files accumulate, become outdated, or get corrupted, contributing to iPhone storage full warnings and sluggish performance. When this happens, they cause the opposite of their intended effect, slowing down apps, causing display glitches, and consuming storage space you could use elsewhere.
Clearing the cache removes these temporary files, frees up space, and forces apps to load fresh data. It also resolves cookies vs cache confusion — cookies store login sessions while cache stores temporary files, and both can be cleared independently. It does not delete your personal information, saved passwords, or app settings.
How to Clear Cache on iPhone: 6 Methods
How to Clear Safari Cache on iPhone (iOS 16, 17, and 18)
The Safari cache is the most impactful thing to clear on most iPhones. It stores website data, cookies, and browsing history that accumulates with every page you visit.
Steps:
- Open Settings on your iPhone.
- Scroll down and tap Safari.
- Scroll down and tap Clear History and Website Data.
- A confirmation prompt appears — tap Clear History and Data.
- Safari cache, cookies, and browsing history are now cleared.
Worth knowing: This clears your browsing history across all devices signed into the same Apple ID through iCloud. If you want to clear cache without removing browsing history, go to Settings, Safari, Advanced, Website Data, and tap Remove All Website Data. This removes stored site data and cookies while keeping your history intact.
How to Clear App Cache on iPhone by Offloading
iPhone does not let you clear app cache directly the way Android does. The closest equivalent is offloading, which removes the app but keeps all its data. Reinstalling brings the app back fresh without the accumulated cache, while your personal data stays intact.
Steps:
- Open Settings on your iPhone.
- Tap General.
- Tap iPhone Storage.
- Wait for the app list to load; it shows storage used by each app.
iOS 18 note: iPhone Storage now loads faster and shows a cleaner breakdown by category at the top before listing individual apps.
- Tap the app whose cache you want to clear.
- Tap Offload App.
- Confirm by tapping Offload App again.
- The app icon stays on your home screen with a small cloud icon.
- Tap the icon to reinstall the app fresh — your data is restored automatically.
Quick fix: Sort apps by size in iPhone Storage to find the biggest cache hogs first. Tap the size column header to sort. Social media apps like Instagram, TikTok, and Snapchat frequently accumulate hundreds of megabytes of cache within weeks.
How to Enable Automatic Cache Clearing on iPhone
Instead of manually offloading apps one by one, you can enable automatic offloading. iPhone will automatically remove apps you have not used in a while when storage runs low, while keeping all their data for when you need them again.
Steps:
- Open Settings.
- Tap General.
- Tap iPhone Storage.
- At the top of the screen, tap Enable next to Offload Unused Apps.
iPhone now automatically offloads apps you rarely open, freeing storage and clearing accumulated cache without any manual effort.
Note: You can also enable this through Settings, App Store, and toggling on Offload Unused Apps. Either path leads to the same setting.
How to Clear Cache in Chrome, Spotify, and Snapchat on iPhone
Some apps have their own built-in cache-clearing option. This is faster than offloading when available.
Chrome:
- Open Chrome on your iPhone.
- Tap the three-dot menu in the bottom right.
- Tap Settings.
- Tap Privacy.
- Tap Clear Browsing Data.
- Select Cached Images and Files and tap Clear Browsing Data.
Spotify:
- Open Spotify.
- Tap your profile icon, then Settings.
- Tap Storage.
- Tap Clear Cache.
Snapchat:
- Open Snapchat and tap your profile icon.
- Tap the Settings gear icon.
- Scroll down to Account Actions.
- Tap Clear Cache, then Clear All.
Worth knowing: Not every app has a built-in cache-clearing option. If the app you want to clear is not listed above and has no cache option in its settings, use the Offload method in Method 2 instead.
How to Clear Keyboard Cache and System Data on iPhone
iPhone stores a keyboard cache that learns your typing patterns and autocorrect preferences. Clearing it resets autocorrect to default, which is useful if autocorrect has learned incorrect words or behaves oddly.
Steps to clear keyboard cache:
- Open Settings.
- Tap General.
- Tap Transfer or Reset iPhone.
- Tap Reset.
- Select Reset Keyboard Dictionary.
- Enter your passcode if prompted.
- Confirm the reset.
Your keyboard dictionary is now cleared. AutoCorrect starts fresh and learns your writing patterns again from scratch.
Pro Tip: This reset does not affect any personal data, apps, or settings beyond the keyboard dictionary. If autocorrect has been frustrating you with wrong corrections, this takes 30 seconds and fixes it immediately. For more control over autocorrect behavior, check our guide on How to Turn Off Autocorrect on iPhone.
How to Clear RAM Cache on iPhone With a Simple Restart
RAM cache is temporary memory that apps use while running. Unlike storage cache, RAM cache clears automatically when you restart your iPhone. If your iPhone feels sluggish even after clearing storage caches, a restart clears the RAM and gives every app a fresh start.
Steps:
- Press and hold the Side button and either Volume button simultaneously.
- Drag the Power Off slider to the right.
- Wait 30 seconds for the phone to fully shut down.
- Press and hold the Side button to turn it back on.
Simple habit: Restart your iPhone at least once a week. RAM cache accumulates continuously as you open and close apps. A weekly restart takes 30 seconds and keeps your iPhone running at full speed between deeper cache clears.
Which Cache Should You Clear First?
Cache Type | How to Clear | Impact | Frequency |
| App cache | Settings → iPhone Storage | High | Every 2–3 months |
| Chrome cache | Inside Chrome app | Medium | Monthly |
| Keyboard cache | Settings → Reset | Low | When needed |
| RAM cache | Restart iPhone | Medium | Weekly |
Safari cache | Settings → Safari | High | Monthly |
What Clearing Cache Does and Does Not Delete
What gets deleted:
- Temporary website files and cookies (Safari cache)
- App temporary files and offline data
- Browsing history (if using Clear History and Website Data)
- Keyboard learned words (keyboard dictionary reset)
What stays safe:
- Your photos and videos
- App login credentials and saved passwords
- App settings and preferences
- Downloaded content you saved intentionally
- Contacts, messages, and emails
Pro Tips to Keep iPhone Cache Under Control
1. Clear Safari cache monthly: Set a reminder. One minute every month prevents Safari from accumulating gigabytes of website data that slows down browsing and wastes storage.
2. Check iPhone Storage regularly: Go to Settings, General, iPhone Storage once a month and look at the top apps by size. Any app using significantly more storage than expected likely has a large cache. Offload and reinstall it to reclaim that space.
3. Use Private Browsing for sensitive searches: Safari’s Private Browsing mode does not save cache, cookies, or history. Use it when you do not want data stored at all — no cache clearing required afterward.
4. Back up before major cache clearing sessions: Clearing the cache is safe, but offloading multiple apps at once can occasionally cause data sync issues on older iOS versions. Keep a recent backup for peace of mind. Check our guide on How to Back Up iPhone to iCloud to make sure your backup is current before any major iPhone maintenance.
Frequently Asked Questions (FAQs)
Does clearing cache on iPhone delete anything important?
No. Only temporary files are removed — website data, app temp files, and cookies. Your photos, contacts, messages, saved passwords, and app settings are completely safe. The only exception is browsing history if you use "Clear History and Website Data" in Safari.
Will clearing cache speed up my iPhone?
It depends on the cause. If an app has a corrupted cache, clearing it fixes the issue immediately. If your iPhone is slow due to low storage, clearing large app caches frees up space and improves performance noticeably.
How often should I clear cache on iPhone?
Clear Safari cache monthly, large app caches every 2–3 months, and restart your iPhone weekly to clear RAM cache. Clearing the cache too often is unnecessary; It exists for a reason.
Why does iPhone not have a clear all cache button?
Apple automates cache management in iOS. The system clears memory independently, so Apple considers a manual "clear all" button unnecessary for most users.
Does clearing cache log me out of apps on iPhone?
Clearing Safari cache logs you out of websites in Safari. Offloading an app keeps your credentials safe in iCloud Keychain — when you reinstall, your saved passwords autofill.
Final Thoughts
Clearing the cache on iPhone takes under two minutes once you know where each type is stored. Start with Safari cache — it has the biggest impact on the most people. Then check iPhone Storage for any apps with unusually large sizes and offload the worst offenders.
Make it a monthly habit and your iPhone will stay fast, responsive, and free of the glitches that come from months of accumulated temporary data.
For more iPhone tips and fixes, visit TechFixZone.
Which method worked best for you? Drop a comment below — especially if you found a surprising amount of cache in one specific app.
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