What clearing an app's cache actually does
When you use an app, it stores small files on your phone or computer to load faster next time — things like images, login information, and settings. Over time these files pile up and can cause the app to freeze, crash, or behave strangely. Clearing the cache means deleting those stored files while keeping your account and personal data intact.
Think of it like clearing out a desk drawer. The app still works the same way and you keep everything that matters — your photos, messages, passwords. You're just removing the clutter that slowed things down. Most people find that clearing cache fixes problems like an app that won't load, buttons that don't respond, or videos that won't play.
The cache is different from the app's data. If you delete data instead of cache, you'll lose your login information and settings. This guide covers cache only, which is safe to clear anytime.
Key Takeaways
- Cache is temporary files an app stores to run faster, and clearing it removes clutter without deleting your account or personal information.
- On Android, go to Settings, find the app under Apps or process Manager, tap Storage, and select Clear Cache.
- On iPhone, you usually delete and reinstall the app, since iOS doesn't give a separate cache-clearing option for most apps.
- Clearing cache takes less than a minute and is safe to do whenever an app is acting slow or frozen.
- If clearing cache doesn't fix the problem, the next step is to clear the app's data or reinstall it entirely.
How to clear cache on Android phones and tablets
Open your phone's Settings app — the gear icon on your home screen or in your app drawer. Scroll down and tap Apps or process Manager, depending on your phone's brand. Find the app that's giving you trouble and tap its name.
Once you're in the app's settings page, look for a button labeled Storage or Storage and Cache. Tap it, then tap Clear Cache. You'll see a message confirming the cache was deleted. That's it — the app is now cleared and ready to run fresh.
If you don't see a Storage button, your phone may show it differently. Look for options like Memory, Cache, or Temporary Files. The exact wording changes between Samsung, Google Pixel, and other Android brands, but the idea is always the same: find the app, find storage settings, clear cache.
How to clear cache on iPhones and iPads
Apple's iOS doesn't give you a built-in way to clear cache for individual apps the way Android does. Instead, you delete the app and reinstall it, which removes all cached files. Open the App Store, search for the app by name, and tap Get to reinstall it. Your login information and account data stay on Apple's servers, so you'll sign back in and everything will be there.
If you want to avoid reinstalling, you can clear cache for Safari (the web browser) by going to Settings, tapping Safari, scrolling down, and tapping Clear History and Website Data. This works for any website you visit in Safari but not for individual apps.
Some apps like Instagram or Gmail have their own settings menu inside the app where you can clear cache. Open the app, go to Settings or Preferences, and look for options like Clear Cache or Storage. Not every app offers this, but it's worth checking before you delete and reinstall.
When to clear cache versus when to clear data
Clear cache when an app is slow, frozen, or won't load properly. It's safe and you won't lose anything important. Clear data only when you're having serious problems that cache clearing didn't fix, or when you want to completely reset an app to how it was when you first installed it. Clearing data will erase your login information, saved preferences, and any offline content the app stored.
If clearing cache doesn't solve the problem after a few hours, try clearing data next. On Android, go back to the app's Storage settings and tap Clear Data instead of Clear Cache. On iPhone, delete and reinstall the app, then don't sign back in — this gives you a completely fresh start. You can always sign back in later if you want to keep using it.
What to do if clearing cache doesn't work
If the app still isn't working after you clear cache, restart your phone. Turn it completely off, wait 10 seconds, and turn it back on. This clears your phone's temporary memory and often fixes problems that cache clearing alone won't solve.
If restarting doesn't help, check whether the app needs an update. Open your phone's app store, search for the app, and see if an Update button appears. Outdated apps sometimes have bugs that newer versions fix. After updating, try using the app again.
If the app still won't work, uninstall it completely and reinstall it fresh. On Android, go to Settings, find the app, and tap Uninstall. On iPhone, press and hold the app icon on your home screen and tap Remove App. Then reinstall it from your app store. This is the most thorough fix short of contacting the app's support team.
Why apps build up cache in the first place
Apps store cache to make themselves faster. Instead of downloading the same image or video every time you open the app, it loads from your phone's storage, which is much quicker. This is helpful at first, but cache files can become corrupted, outdated, or just too large, and then they slow things down instead of speeding them up.
Cache also stores login sessions so you don't have to type your password every time. When that cached login information gets out of sync with the app's servers, you might see error messages or get logged out randomly. Clearing cache fixes this by forcing the app to fetch fresh information from the internet.
How often you should clear cache
You don't need to clear cache on a schedule. Only do it when you notice a problem — an app that's slow, won't load, or keeps crashing. For most people, that's once every few months or less often. If an app is particularly troublesome, you might clear its cache once a month.
Some people clear cache regularly as general maintenance, and that's fine too. It won't hurt anything and might prevent problems before they start. The downside is that the app will be slightly slower the first time you use it after clearing cache, because it has to read and store those files again. After that, it runs normally.
Frequently Asked Questions
Will clearing cache delete my photos, messages, or passwords?
No. Cache is only temporary files the app uses to run faster. Your photos, messages, account login, and personal settings all stay on your phone and in your account. You're only removing clutter, not anything important.
What's the difference between cache and cookies?
Cache is files an app stores to load faster — images, videos, and settings. Cookies are small text files that remember who you are when you visit a website, like your login or shopping cart. Both are temporary and safe to clear, but they serve different purposes. Clearing one doesn't clear the other.
Can I clear cache on my computer the same way as my phone?
The steps are different for each program. In most desktop apps, look in the Settings or Preferences menu for an option like Clear Cache, Clear Temporary Files, or Reset. Web browsers like Chrome and Firefox have their own cache-clearing tools in Settings. The idea is the same, but the exact steps vary by program.
Is it safe to clear cache while the app is running?
It's safer to close the app first, then clear cache from your phone's settings. If you try to clear cache while the app is open, it might cause the app to crash. Close the app completely, clear the cache, then open it again.
Why does my app ask for my password again after I clear cache?
Cache stores your login session so you stay signed in. When you clear cache, that session information is deleted, so the app treats you as a new user and asks you to sign in again. This is normal and expected. Your password itself is stored securely and hasn't changed.