What is cache and should you clear it?

There’s more happening inside your favorite devices than you might think. Every smartphone, computer, and laptop relies on key components to run smoothly—one of which is cache. But what exactly is cache, and why does it matter?

Asurion Experts answer your tech questions. Whether you're wondering how to clear the cache on your Xbox Series S™ or need tech support, we have a solution. 

Understanding cache

A cache is a piece of hardware or software installed on electronic devices, internet browsers, and gaming systems. It's a memory storage tool that saves information about the webpages and platforms you frequently use. When in use, the central processing unit (CPU) or software application pulls stored data directly from the cache so they don't have to retrieve all-new information every time.

When you direct your device to a website or application, the CPU or browser performs a quick check on the cache. If data is available there, it retrieves it. This is known as a "cache hit." 

If there is no relevant data, it's a "cache miss." The CPU or software retrieves what it needs from your device's hard drive or a remote server. It then stores the new data in the cache until you need it again.

Reasons to clear cache

Over time, the cache can accumulate an abundance of data that takes up storage space on your device. When the cache reaches its limits, it can cause problems with your device. You may notice that websites load slowly or that your applications crash. 

Sometimes, files saved in the cache become corrupted. This can also cause application issues or security risks. Clearing the cache deletes the problematic files. Your system will save new, uncorrupted files next time you use an application or visit a website.

Clear cache on Android

To clear an Android™ cache for the apps you use, follow these steps:

1. Open Settings.
2. Tap Apps or Apps and notifications.
3. Tap the name of the app you want to clear the cache for.
4. Tap Storage and Cache > Clear Cache.

Clear cache on iOS (iPhone and iPad)

iPhone® and iPad® use iOS® software to run applications. Take these steps to clear your mobile device's cache:

1. Open Settings.
2. Tap General > iPhone Storage.
3. Tap the name of the app you want to clear the cache for.
4. Tap Offload App to free up storage. You won't lose any saved documents or data.
5. If you no longer need the app, tap Delete App. This option removes the app and all of its data from your device. 

Clear cache in Safari (iOS or macOS)

Apple® devices include the pre-installed Safari® web browser. If you regularly use it to browse the internet, clearing the cache in Safari may improve website loading speed. 

iOS devices

1. Open Settings.
2. Tap Apps > Safari.
3. Tap Clear History and Website Data. 

macOS devices

1. Open Safari > Settings > Advanced.
2. Check the box for Show features for web developers.
3. Click the Develop tab.
4. Click Empty Caches. 

Clear cache in Chrome (mobile or desktop)

If you use the Google Chrome™ browser on your device, you can clear its cache and delete cookies in a few simple steps.

1. Open Chrome.
2. Tap or click the More menu. It uses an icon that resembles three horizontal dots.
3. Tap or click Delete browsing data.
4. Select a time range, such as Last hour or All time.
5. Confirm the data types you want to remove.
6. Tap or click Delete data. 

FAQs

Should you regularly clear your cache on a device?

Clearing the cache too frequently may slow down application loading speed. While it's good tech hygiene to refresh the cache every month or so, there's no need to clear it daily. If you experience problems running a program or loading websites, see if clearing the cache on your device fixes the issue. 

What happens when you clear the cache on your phone or browser?

Clearing the cache removes temporary files saved on your device. These files may take up significant storage, so removing them frees up storage for other items. The process can also delete corrupted files that cause websites to display incorrect images or data.

What's the difference between cache and cookies?

The cache saves files containing website and application data, such as HTML pages, scripts, and images, to your device. This helps speed up loading times and provides a better user experience. Browser cookies are also temporary files, but they store user-specific details like your browsing activity and login information.