What cache is and why you might clear it
Cache is temporary data that apps and your phone's system store to load faster next time. When you open an app, it saves images, login information, and other pieces so it doesn't have to download them again. This makes things quicker — but over time, cache can pile up and take storage space, or occasionally cause an app to behave oddly.
Clearing cache won't delete your photos, messages, or account information. It only removes those temporary files. Your apps will rebuild their cache the next time you use them, so you might notice them loading slightly slower once, then returning to normal speed.
You have two main routes: clear cache for a single app, or clear system cache for everything at once. Which one you choose depends on whether you're troubleshooting a specific app or just freeing up space.
Key Takeaways
- Cache is temporary data apps store to load faster, and clearing it does not delete your photos, messages, or login information.
- You can clear cache for one app at a time through Settings > Apps, or clear all system cache at once through Settings > Storage.
- Clearing cache for a single app takes about one minute and often fixes apps that are freezing or crashing.
- System cache clearing may take a few minutes and is useful if your phone is running low on storage space.
Clear cache for a single app
This method works when one app is slow, crashing, or behaving strangely. Open Settings on your Samsung phone. Scroll down and tap Apps. Find the app you want to clear cache for — if you don't see it in the list, tap the three dots in the top right corner and select Show system apps to see everything.
Tap the app name. You'll see buttons for Force stop, Uninstall, and other options. Look for Storage or Storage and cache. Tap it, then tap Clear cache. The button may say Delete cache depending on your Samsung model and Android version. You'll see a confirmation that the cache was cleared.
The app will work normally the next time you open it. If the app was crashing, this often fixes it. If it doesn't, you can try Clear data instead, but that will log you out of the app and erase any saved settings — so only do that if clearing cache alone didn't help.
Clear all system cache at once
This removes temporary files from your entire phone, not just one app. Open Settings and tap Storage. You'll see how much space your phone is using. Look for an option called Cached data or Cache — the exact name varies by Samsung model. Tap it, then confirm that you want to delete it.
This process may take a few minutes. Your phone will not restart, and you won't lose any personal data. Once it's done, you'll see the storage number update to show the space you've freed up. The amount varies depending on how many apps you use and how long it's been since you last cleared cache — anywhere from a few hundred megabytes to several gigabytes.
Clear cache through Samsung's maintenance tools
Some Samsung phones include a built-in tool called Device care or Smart Manager that can clear cache automatically. Open Settings and search for Device care or Smart Manager. If your phone has it, tap Storage and look for an option to clean up or clear cache. You can usually set it to run automatically on a schedule.
This is optional — the manual methods above work just as well. The built-in tool is mainly useful if you want to set it and forget it, rather than clearing cache by hand every few months.
When to clear cache versus when to clear data
Clear cache when an app is slow or freezing, or when you want to free up storage space. It's safe and won't log you out of anything. Clear data is stronger — it removes cache plus your login information, saved settings, and any files the app stored locally. Only clear data if clearing cache didn't fix the problem, or if you're trying to completely reset an app.
If you clear data, you'll have to log back into the app and set it up again. Some apps will ask you to re-enter your password the next time you open them. This is normal and expected.
What happens after you clear cache
Apps will load slightly slower the first time you open them after clearing cache, because they have to download their temporary files again. This usually takes just a few seconds. After that, they'll run at normal speed. You won't notice any difference in how the app works or what it shows you.
If you cleared cache because an app was crashing, it should stop crashing once you reopen it. If it still crashes, the problem is likely something else — try restarting your phone, or uninstalling and reinstalling the app.
Frequently Asked Questions
Will clearing cache delete my photos or messages?
No. Cache is only temporary data that apps use to load faster. Your photos, messages, contacts, and account logins are stored separately and won't be touched. Clearing cache is completely safe.
How often should I clear cache?
There's no set schedule. Clear it when your phone is running low on storage, or when an app is misbehaving. Some people clear it monthly, others only when they notice a problem. It won't hurt to clear it more often.
What's the difference between clearing cache and clearing data?
Cache is temporary files only. Data includes cache plus your login information, settings, and anything the app saved locally. Clearing data is stronger but will log you out of the app. Only clear data if clearing cache didn't fix the problem.
Can I clear cache automatically?
Some Samsung phones have Device care or Smart Manager, which can clear cache on a schedule. You can also use third-party cleaner apps, though they're not necessary — clearing cache by hand takes less than a minute.
Why is my app still slow after clearing cache?
Slowness can come from other causes: not enough free storage space, too many apps running at once, or an outdated app version. Try restarting your phone, closing other apps, or updating the slow app from the Google Play Store.