What clearing your cache does and why you might need to
Your iPhone stores temporary files called cache from apps and websites you use. These files help apps load faster the next time you open them. Over time, cache can take up gigabytes of storage and sometimes cause apps to freeze, crash, or behave oddly. Clearing cache won't delete your photos, messages, or account information — it only removes those temporary files.
You have three main options: clear cache for one app at a time, clear Safari browsing cache, or clear cache system-wide through your iPhone settings. Which one you choose depends on whether a specific app is misbehaving or whether you want to free up storage across your whole phone.
Key Takeaways
- Clearing cache removes temporary files stored by apps and Safari, not your actual data like photos or messages.
- You can clear cache for a single app by going to Settings > General > iPhone Storage, finding the app, and tapping "Offload App" or "Delete App" then reinstalling it.
- To clear Safari cache, go to Settings > Safari > Clear History and Website Data and choose a time range.
- Clearing cache may temporarily slow down apps slightly since they have to rebuild those temporary files, but it often fixes freezing and crashing.
Clear cache for a single app that's acting up
If one app keeps freezing or crashing, clearing just that app's cache often fixes the problem without touching anything else. Open Settings, tap General, then tap iPhone Storage. Scroll down and find the app that's giving you trouble. You'll see how much space it's using.
Tap the app name. You'll see two options: "Offload App" and "Delete App." Tap "Offload App" first — this removes the app but keeps your data inside it. Wait a few seconds, then go back to the App Store, search for the app, and tap the download button to reinstall it. The app will download fresh, and its cache will be empty. Your account information and any data you created in that app stays intact because you offloaded rather than deleted.
If offloading doesn't work or you want a more thorough clean, tap "Delete App" instead, then "Delete App" again to confirm. Reinstall it from the App Store. This removes everything including the app's cache and any local data, so use this only if the app isn't working at all.
Clear Safari browsing cache and website data
Safari stores cache from websites you visit so they load faster next time. If Safari is slow or websites aren't loading correctly, clearing this cache usually helps. Open Settings and scroll down to find Safari — it's not under General, it's its own section in the main Settings menu.
Tap Safari, then scroll down and tap "Clear History and Website Data." A popup will ask you what time range to clear. Choose "All time" to clear everything, or pick a shorter range like "Last hour" or "Last day" if you only want to remove recent cache. Tap "Clear History and Data" to confirm. This removes browsing history, cookies, and cached website files, but it does not delete your saved passwords or autofill information.
Clear cache system-wide without deleting apps
If you want to free up storage space across your whole phone without reinstalling apps, you can clear cached files through Settings. This method is less aggressive than offloading apps — it removes temporary files but leaves the apps and your data alone.
Open Settings, tap General, then tap iPhone Storage. Look at the list of apps and their sizes. Apps with large cache files will show a bigger number. You can offload apps one at a time using the method above, or you can take a different approach: go to Settings > General > iPhone Storage > Enable Automatic Offloading. This tells your iPhone to automatically remove apps you haven't used in a while and reinstall them if you open them again. This frees up cache and storage without you having to do anything manually.
What to expect after clearing cache
After you clear cache, apps may take a few extra seconds to load the first time you open them because they're rebuilding those temporary files. This is normal and temporary. By the second or third time you open the app, it should load at normal speed again.
You might notice that apps feel slightly snappier overall because your iPhone isn't managing as much cached data. If an app was crashing before, it should stop. If it doesn't, the problem is something other than cache — try restarting your iPhone or checking if the app needs an update.
When clearing cache won't help
Clearing cache fixes most app crashes and freezes, but not all. If an app keeps crashing even after you've cleared its cache and reinstalled it, check the App Store to see if an update is available. Tap your profile icon in the top right, then tap "Updates" to see pending app updates. Install any updates for the app that's misbehaving.
If the app still crashes after updating, restart your iPhone completely. Hold down the power button and volume down button together until "Slide to power off" appears, then slide to turn it off. Wait 10 seconds, then press the power button to turn it back on. This clears your iPhone's temporary memory and often fixes problems that cache clearing alone won't solve.
Frequently Asked Questions
Will clearing cache delete my photos or messages?
No. Cache is temporary data stored by apps and websites. Your photos, messages, contacts, and account information are stored separately and won't be affected by clearing cache. Offloading an app keeps your data inside it safe. Only "Delete App" removes everything, and you can always reinstall the app afterward.
How much storage space will I free up by clearing cache?
It depends on how many apps you use and how long you've had your iPhone. Some apps store hundreds of megabytes of cache, while others store very little. You can see exactly how much space each app is using by going to Settings > General > iPhone Storage and looking at the numbers next to each app name.
Do I need to clear cache regularly?
Not necessarily. Most people only need to clear cache when an app starts acting up or when storage space runs low. If your iPhone is running smoothly and you have plenty of free storage, clearing cache isn't urgent. Enabling Automatic Offloading in Settings handles cache management for you passively.
What's the difference between clearing cache and clearing browsing history?
Browsing history is a list of websites you've visited. Cache is the temporary files those websites stored on your phone. Clearing history removes the list but leaves the cached files. Clearing cache removes the files but doesn't necessarily remove the history. When you tap "Clear History and Website Data" in Safari, you're clearing both at once.
Can I clear cache without restarting my apps?
For Safari, yes — you can clear cache without restarting anything. For individual apps, the cleanest method is to offload and reinstall, which does require restarting the app. Enabling Automatic Offloading in Settings clears cache in the background without you having to do anything manually.