If your iPhone feels sluggish, apps keep crashing, or that “Storage Almost Full” warning keeps popping up, learning how to clear cache on iPhone is one of the fastest fixes you can try. Cache is just temporary data — copies of images, scripts, and web pages your phone saves so things load faster next time. Helpful in theory, but over months it piles up, and a bloated cache can slow everything down.

Here is the honest part: the iPhone has no single “clear all app cache” button. You clear Safari in one place and handle other apps one at a time. The whole thing takes about ten minutes, and you will not lose photos or messages.

How to Clear Safari Cache on iPhone

Safari is usually the biggest cache hog. Clearing it logs you out of websites, so make sure important passwords are saved in iCloud Keychain first.

  1. Open Settings, then scroll down and tap Safari.
  2. Tap Clear History and Website Data.
  3. Choose a time range — All History clears everything — and tap Clear History.

That wipes Safari’s cache, cookies, and browsing history in one go. If you want to keep your history but dump the stored website data, there is a second path: Settings > Safari > Advanced > Website Data, then tap Remove All Website Data. Same idea, slightly more surgical.

Hand holding an iPhone showing a browser with website data options
Safari keeps its own stash of website data — you can clear it in under a minute.

How to Clear Cache for Other Apps

For apps like Instagram, TikTok, YouTube, or Facebook, you have three options, depending on the app.

Check the app’s own settings first. Some apps include a built-in cache button. In many social and video apps, look under Settings, Storage, or Data Usage for “Clear Cache” or “Clear Storage.” That is the cleanest option when it exists, because it only removes temporary files.

Offload the app. If there is no in-app button, go to Settings > General > iPhone Storage, tap the app, and choose Offload App. This deletes the app itself but keeps your documents and data. Reinstall it from the App Store and it comes back fresh, without the cached junk. Your login and saved content survive — it is the closest thing to a cache-clear button the iPhone has.

Delete and reinstall. If offloading does not free enough space, delete the app entirely and reinstall it. This is the nuclear option: it removes the app and all of its local data. Use it for apps where everything lives in the cloud anyway, like streaming and social apps. If you are clearing space because an app has become more trouble than it is worth, you might also want to read how to delete an Instagram account instead of just reinstalling it.

Check What Is Actually Eating Your Storage

Before you start deleting things at random, look at the breakdown. Go to Settings > General > iPhone Storage and wait a few seconds for the bar to load. iOS shows exactly how much space each app uses, split between the app itself and its “Documents & Data” — that second number is mostly cache.

A few things people usually find here:

  • Safari and Chrome holding hundreds of megabytes of website data.
  • Social apps with a gigabyte or more of cached photos and videos.

If storage is still tight after clearing cache, the iPhone Storage screen also suggests offloading unused apps automatically. Turn that on if you are the type who downloads an app, uses it once, and forgets it exists.

How Often Should You Clear Cache?

Every two or three months is plenty for most people. Clear it when you notice a symptom: an app crashing, pages loading weirdly, or storage running low.

One more quick win: restart your phone after a cleanup. Hold the side button and either volume button, slide to power off, wait 30 seconds, and turn it back on. It clears temporary system files and gives iOS a fresh start. While the phone restarts, you have about a minute to kill — enough time to start a batch of cold brew coffee for later.

FAQ

Will clearing cache delete my photos or messages?

No. Clearing Safari data or offloading an app does not touch photos, messages, or contacts. Deleting an app removes only its local data — anything in the cloud stays put.

Does clearing cache make my iPhone faster?

Sometimes. If an app was choking on corrupted cached files, clearing it can fix crashes and lag. If the battery is worn or storage is completely full, cache clearing alone will not solve it.

Is there a “clear all cache” button on iPhone?

No. Unlike Android, iOS does not offer one system-wide button. You clear Safari in Settings, and handle other apps through their own settings, offloading, or reinstalling.

Why does my cache fill up again so fast?

Because that is its job. Every site you visit and every video you watch saves temporary files again. A fast-growing cache usually just means you use that app a lot.