What clearing app cache does and why you might need to

Clearing app cache removes temporary files that apps store on your iPhone to load faster next time you open them. These files take up storage space and can sometimes cause an app to behave oddly — freezing, crashing, or loading slowly. Clearing cache does not delete your account information, messages, photos, or any data you created inside the app.

You might clear cache if an app is acting up, if you are running low on storage space, or if you want to reduce the amount of data an app has stored about your activity. The process is different on iPhone than on Android because iPhone does not give you a single "clear all cache" button in Settings.

Key Takeaways

  • iPhone does not have a built-in cache-clearing tool in Settings — you clear cache by offloading or deleting the app itself.
  • Offloading an app removes it from your phone but keeps your account data and documents, so you can reinstall it without losing anything.
  • Deleting an app removes both the app and its cache, but you will need to sign back in when you reinstall it.
  • You can also clear Safari cache and cookies separately through Settings if a web browser is the problem.

Offload the app to clear its cache without losing your data

The safest way to clear an app's cache on iPhone is to offload it. Offloading removes the app from your phone but keeps your login information and any documents or data you created inside the app. When you reinstall it, everything is still there.

To offload an app, go to Settings > General > iPhone Storage. Scroll down and tap the app you want to clear. Tap Offload App, then confirm by tapping Offload App again. The app disappears from your home screen, but a small cloud icon with a down arrow appears where it was. Tap that icon to reinstall the app — it will download fresh and your account will still be logged in.

This method works best if you want to keep your account active and your settings intact. It takes a few minutes for the app to download again, depending on its size and your internet speed.

Delete and reinstall the app for a complete cache wipe

If offloading does not fix the problem or you want to completely remove all traces of the app, delete it and reinstall it fresh. This removes the app, its cache, and any stored data. When you reinstall it, you will need to sign in again.

To delete an app, press and hold its icon on your home screen or in the App Library. Tap Remove App, then tap Remove from Home Screen or Delete App. If you choose Delete App, tap Delete to confirm. Then open the App Store, search for the app by name, and tap the cloud icon or Get button to reinstall it.

Reinstalling takes longer than offloading because the app has to download completely, but it clears everything associated with the app from your phone. Have your username and password ready, because you will need to sign back in.

Clear Safari cache and cookies if a web browser is slow

If Safari is the app acting up, you can clear its cache without deleting the whole browser. Go to Settings > Safari and scroll down to Clear History and Website Data. Tap it, choose how far back you want to clear (last hour, today, last week, or all time), and tap Clear History and Data.

This removes your browsing history, cookies, and cached website files. You will stay logged into most websites because Safari stores login tokens separately, but some sites may ask you to sign in again. This is faster than deleting Safari itself and does not affect your bookmarks or reading list.

Check storage to see which apps are using the most cache

Before you clear cache, you can see which apps are taking up the most space. Go to Settings > General > iPhone Storage. The list shows every app and how much space it uses, with the largest at the top. Tap any app to see a breakdown — the number shown is usually the app itself plus its cache and stored data combined.

Apps that use a lot of cache are often video or music apps, social media apps, or games. If an app shows a size much larger than you would expect, clearing its cache might free up several gigabytes. The storage screen also shows you how much total space is free on your phone, so you can decide whether clearing cache is worth the effort.

Restart your iPhone if an app is still acting up after clearing cache

Sometimes an app continues to misbehave even after you clear its cache. Try restarting your iPhone before you do anything else. Press and hold the side button and either volume button until the power-off slider appears, then drag it to turn off your phone. Wait 10 seconds, then press and hold the side button again until the Apple logo appears.

A restart clears temporary memory and can fix glitches that cache clearing alone cannot. If the app still freezes or crashes after a restart, the problem may be with the app itself rather than cached files. Check the App Store to see if an update is available, or contact the app maker's support team.

Frequently Asked Questions

Will clearing cache delete my photos, messages, or account information?

No. Cache is only temporary files the app uses to load faster. Your photos, messages, documents, and account login stay on your phone. If you delete the app entirely, you will need to sign back in, but your account and its contents are still there on the app maker's servers.

How much storage space will I free up by clearing cache?

It depends on the app. Social media and video apps can store hundreds of megabytes or even gigabytes of cached images and videos. A small utility app might only have a few megabytes of cache. Check the app's size in iPhone Storage to get an idea of how much space it is using total.

Do I need to clear cache regularly?

Only if you are running low on storage or an app is misbehaving. Most people do not need to clear cache often. If you find yourself clearing the same app's cache every few weeks, that app may have a bug — check for updates or consider using a different app instead.

What is the difference between offloading and deleting an app?

Offloading keeps your account data and settings, so you can reinstall the app and pick up where you left off. Deleting removes everything, including your login information, so you start fresh when you reinstall. Offloading is safer if you are not sure whether you want to keep the app.