What is cache on my iPhone?
Cache is a collection of temporary files that apps and websites store locally on your device to speed up loading, browsing, and your overall session. For example, Safari saves images or scripts from sites so they don't have to download again. It's helpful, but too much cache can slow your iPhone down, so clearing it regularly keeps performance smooth.
Also: Cookie pop-ups don't have to be a fact of life online – how I block them and why
Clearing cache only removes temporary data, not your bookmarks, messages, photos, or passwords. Offloading an app also preserves your data and settings if you want to reinstall it later, but deleting an app wipes everything for a full reset.
Is cache the same as cookies?
Cache and cookies aren't the same. Cache stores copies of images, scripts, and other elements so websites load faster next time. Cookies, on the other hand, save personal data like logins, preferences, and shopping cart items. While clearing cache removes saved page files, deleting cookies erases your logins and settings, requiring you to sign in and reconfigure preferences.
How often should I clear the cache on my iPhone?
It depends, but a good habit is to clear your browser cache monthly and restart your iPhone daily or at least once a week. You should also regularly offload or delete apps you don't use, especially if they're taking up too much space or acting glitchy.
Can I clear cache in other browsers or apps?
Yes. Browsers like Firefox and Edge have their own cache-clearing options. But in my experience, many apps don't let you manage cache. Some of the more popular ones do, like TikTok and Snapchat, which you can find directly in their settings.
Can you block cookies on an iPhone?
You can block cookies in Safari. Turning them off stops sites from tracking you, but it can also break some websites or limit features. So you'll need to weigh privacy against usability. If you'd like to block cookies in Safari, follow these steps:
- Go to Settings > Safari > Advanced.
- Toggle on “Block All Cookies.”
Also: The best secure browsers for privacy
There are also third-party extensions — such as Ghostery and Disconnect — that help you block cookies and trackers in Chrome.
How to check your iPhone's storage
Your iPhone's Settings can show you what's eating up your storage, whether it's photos, videos, music, or even an app's temporary data. To see a full breakdown of your storage usage, follow these steps:
- Go to the iPhone's Settings.
- Tap General.
- Select iPhone Storage.
- Scroll through to find the app you're looking for.
- Tap the app to view storage status and options.
Also: Does your iPhone have enough space? How to find out
Unfortunately, you can't clear a third-party app's cache directly in Settings, but this view gives you a clear breakdown of your storage and lets you delete or offload apps.
