What clearing cache actually does
Clearing cache removes temporary files your Samsung phone stores while using apps and browsing the web. These files speed things up the next time you open an app — your phone doesn't have to read the same images or data twice. Over time, cache builds up and can slow your phone down or cause apps to behave oddly.
Clearing cache is safe. It will not delete your photos, messages, passwords, or anything you created yourself. It only removes the temporary copies apps made to run faster. Your apps will rebuild their cache automatically the next time you use them.
Most people clear cache when an app is freezing, crashing, or running slowly. You can also clear it regularly — once a month is reasonable — to keep your phone running smoothly.
Key Takeaways
- Clearing cache removes temporary files apps store, not your personal data like photos or messages.
- You can clear cache for one app at a time through Settings, or clear all app cache at once through Storage.
- The fastest route is Settings > Apps > select an app > Storage > Clear Cache, which takes about 30 seconds.
- If an app keeps crashing, clearing its cache often fixes the problem without reinstalling the app.
Clear cache for a single app
This method works when one specific app is slow or crashing. Open Settings on your Samsung phone. Tap Apps (on some Samsung models this is called process Manager).
Find the app you want to clear cache for — you can scroll through the list or use the search icon at the top. Tap the app name. You will see a screen with information about that app. Tap Storage. You will see two buttons: Clear Cache and Clear Data. Tap only Clear Cache. Do not tap Clear Data, which removes your settings and saved progress in that app.
The cache clears when ready. You can now close Settings and use the app normally. The next time you open it, it may take a few extra seconds to load while it rebuilds its cache.
Clear cache for all apps at once
If your phone is running slowly overall, you can clear cache for every app in one action. Open Settings and tap Storage (on some models, this is under Device Care first). You will see a breakdown of what is using space on your phone.
Look for Cached Data or Cache — the exact name varies by Samsung model and Android version. Tap it. A popup will ask if you want to delete all cached data. Tap Delete or OK. This clears cache for every app at once and usually frees up several hundred megabytes of space.
This action is completely safe and does not affect any of your personal files or app settings.
Clear cache through Device Care
Newer Samsung phones have a Device Care tool that can clear cache as part of a broader cleanup. Open Settings and tap Device Care. Tap Storage. You will see options including Optimize Now or Clean Up. Tap the button offered — it will clear cache along with other temporary files.
Device Care also shows you which apps are using the most storage and which files are taking up the most space. This is useful if your phone is running low on storage and you need to understand what is filling it up.
When to clear cache versus when to clear data
Clear Cache removes temporary files only. Use this when an app is slow or crashing, or when you want to free up space. It is always safe.
Clear Data removes everything the app has stored, including your login information, saved games, preferences, and any files you created in that app. Only use this if an app is severely broken and you are willing to set it up from scratch. You will have to log back in and reconfigure your settings.
If you are not sure which one to use, always choose Clear Cache first. It solves most problems without losing anything.
What to do if clearing cache does not fix the problem
If an app still crashes or runs slowly after clearing cache, try clearing its data instead. Open Settings > Apps > select the app > Storage > Clear Data. This removes everything the app stored, so you will need to log back in and set it up again, but it often fixes serious problems that cache clearing alone cannot solve.
If the app still does not work after clearing data, uninstall it and reinstall it from the Google Play Store. This gives you a completely fresh copy of the app. Open the Play Store, search for the app, and tap Install.
If your entire phone is running slowly even after clearing all cache, the problem may be something else — too many apps running at once, a full storage drive, or an app using too much battery. Device Care can help diagnose this. Open Settings > Device Care and tap each section to see what is consuming resources.
How often to clear cache
You do not need to clear cache on a schedule. Clear it when you notice a problem — an app is slow, crashing, or behaving strangely — or when your phone is running low on storage space.
If you use your phone heavily and install many apps, clearing cache once a month keeps things running smoothly. If you use your phone lightly, you may never need to clear cache manually. Your phone handles most of this automatically.
Clearing cache does not harm your phone, so if you are unsure whether to do it, it is safe to go ahead.
Frequently Asked Questions
Will clearing cache delete my photos or messages?
No. Cache is temporary data apps create while running. Your photos, messages, contacts, and anything you created yourself are stored separately and are not affected by clearing cache.
Why is there a difference between Clear Cache and Clear Data?
Clear Cache removes only temporary files the app created to run faster. Clear Data removes everything — temporary files, your login information, saved progress, and settings. Use Clear Cache for routine maintenance. Use Clear Data only when an app is severely broken and you are willing to set it up again from scratch.
Can I clear cache while using an app?
It is better to close the app first. If you clear cache while an app is running, it may crash. Close the app completely, clear its cache through Settings, then open it again.
Does clearing cache make my phone faster?
It can. If cache has built up over months, clearing it may free up several hundred megabytes of space and reduce the work your phone has to do. The speed improvement is usually noticeable only if your phone was already running low on storage or the app was crashing frequently.
What if I accidentally tap Clear Data instead of Clear Cache?
You will lose your login information and settings for that app, but the app itself is not deleted. Open the app, log back in with your username and password, and reconfigure your settings. Your personal data is not affected.