What clearing cache does and why you might do it

Cache is temporary data that apps store on your phone to load faster next time you open them. When you clear cache, you delete that stored data but keep your passwords, login information, and personal settings intact. Clearing cache can free up storage space, fix an app that is running slowly or crashing, or resolve login problems.

You do not need to clear cache often — most people do it once or twice a year, or when a specific app starts misbehaving. If your phone is running low on storage, clearing cache is one of the quickest ways to recover gigabytes without deleting photos or messages.

Key Takeaways

  • You can clear cache for individual apps through Settings > Apps, or clear all app cache at once through Settings > Storage.
  • Clearing cache removes temporary files but keeps your passwords, account logins, and saved preferences.
  • The exact menu names vary slightly between Samsung models and Android versions, but the process is the same: open Settings, find Apps or Storage, and select the clear option.
  • If an app crashes or freezes after you clear its cache, the app will rebuild the cache automatically the next time you use it.

Clear cache for a single app through the Apps menu

Open Settings on your Samsung phone. Scroll down and tap Apps (sometimes labeled process Manager or Manage Apps depending on your model).

Find the app whose cache you want to clear and tap it. Tap Storage or Storage and Cache. You will see two buttons: Clear Cache and Clear Data. Tap Clear Cache only — do not tap Clear Data, which will erase your login information and settings for that app.

The cache clears when ready. You can now close Settings and use the app normally. The next time you open it, it will rebuild the cache as you use it.

Clear all app cache at once through Storage settings

Open Settings and tap Storage (sometimes labeled Device Care > Storage on newer Samsung phones). You will see a breakdown of what is using space on your phone.

Look for an option labeled Cached Data, Cache, or Clear Cache. Tap it, then confirm when prompted. This removes cache from all apps at the same time and typically frees up 100 MB to 1 GB depending on how long it has been since you last cleared it.

This method is faster if you want to clear everything at once. The downside is that you cannot choose which apps to clear — it is all or nothing.

Clear cache for the system itself

Your Samsung phone also stores cache for the system itself, separate from individual apps. To clear this, open Settings and go to Storage. Tap the three-dot menu (or More Options) and look for Clear Cache or Clean Now.

Some Samsung models include a Device Care tool that does this automatically. Open Settings, tap Device Care, and tap Storage. You will see a Clean button that removes system cache and temporary files in one tap.

What to do if an app stops working after clearing cache

If an app crashes, freezes, or shows blank screens after you clear its cache, this is temporary. The app will rebuild its cache the next time you open it, which usually takes a few seconds to a minute depending on the app.

If the problem persists after reopening the app, try restarting your phone. If it still does not work, you may need to uninstall and reinstall the app — but this is rare. Contact the app maker's support if the problem continues.

How much storage you can expect to free up

The amount of space you recover depends on how many apps you use and how long it has been since you last cleared cache. Streaming apps like YouTube, Netflix, and Spotify accumulate the most cache — often 100 to 500 MB each. Social media apps like Instagram and Facebook typically store 50 to 200 MB.

If you have not cleared cache in months, clearing all app cache at once might free up 1 to 3 GB. If you clear it regularly, each clearing usually recovers 200 to 500 MB. The exact amount varies by phone model and usage.

When to clear cache versus when to clear data

Clear Cache when an app is slow, crashing, or you want to free up storage. You will stay logged in and keep all your settings.

Clear Data only when an app is completely broken and you want to reset it to factory condition — this erases your login information, saved preferences, and any data stored in the app. You should rarely need to do this. If you do, you will have to log back in to the app and set it up again from scratch.

Frequently Asked Questions

Will clearing cache delete my photos or messages?

No. Cache is temporary data stored by apps, not your personal files. Your photos, messages, contacts, and documents are stored separately and will not be affected by clearing cache.

Do I need to clear cache regularly?

Not necessarily. Most people do not need to clear cache more than once or twice a year unless their phone is running low on storage or an app is misbehaving. If your phone has plenty of free space, you can skip it.

What is the difference between clearing cache and clearing data?

Clearing cache removes temporary files and frees up storage. Clearing data erases everything the app has stored, including your login information and settings, and resets the app to its original state. Only clear data if an app is broken and you want to reset it completely.

Why is my app still slow after I cleared its cache?

Slowness can come from other causes — a poor internet connection, too many apps running at once, or a problem with the app itself. Try restarting your phone and closing other apps. If the problem continues, try uninstalling and reinstalling the app.

Can I clear cache on my Samsung without going into Settings?

Some Samsung phones include a Device Care shortcut on the home screen or in the quick settings panel that clears cache with one tap. Check your phone's home screen and pull down the notification panel to see if this option is available.