What clearing your cache does and why you might want to
Cache is temporary data that apps store on your phone to load faster next time you use them. When you clear the cache, you delete those temporary files but keep your passwords, login information, and saved settings intact. Clearing cache frees up storage space, can fix apps that are running slowly or crashing, and removes data from apps you no longer use.
Most people clear cache once or twice a year, or when their phone storage is running low. You will not lose photos, messages, or any files you created — only the temporary speedup data that apps can rebuild on their own.
Key Takeaways
- Clearing cache removes temporary app data and frees storage space without deleting your photos, messages, or login information.
- On Android, you can clear cache for individual apps in Settings > Apps or clear all cache at once in Storage settings.
- On iPhone, you typically delete and reinstall apps to clear their cache, or clear Safari cache in Settings > Safari.
- Clearing cache may temporarily slow down apps slightly as they rebuild their temporary files, but the slowdown is usually unnoticeable.
How to clear cache on Android phones
Open Settings and go to Apps (sometimes called Application Manager). Find the app you want to clear cache for and tap it. Look for a button labeled Storage or Storage and cache, then tap Clear cache. The app will remain installed with your login information and settings unchanged.
To clear cache for all apps at once, go to Settings > Storage (or Device care on Samsung phones) and look for an option like Clean now, Manage storage, or Optimize. Tap it and select Cache files or Temporary files. This removes cached data from every app in one action.
The exact names and locations vary slightly between Android versions and phone makers — Samsung, Google Pixel, and other brands arrange their settings differently — but the principle is the same: find Storage or Apps in Settings and look for cache or temporary files.
How to clear cache on iPhone
iPhone does not have a single "clear cache" button like Android does. Instead, you clear cache by deleting and reinstalling the app. Open Settings > General > iPhone Storage, find the app, and tap Offload App. This removes the app but keeps your data. Then go to the App Store, search for the app, and tap the download button to reinstall it.
If you use Safari, you can clear Safari's cache separately. Go to Settings > Safari and tap Clear History and Website Data. Choose how far back to clear (last hour, today, last week, or all time) and confirm. This removes cached web pages and browsing history but does not affect other apps.
For most people, clearing Safari cache is enough. You only need to offload and reinstall apps if a specific app is running slowly or crashing.
How much storage space you will free up
The amount of space varies widely depending on which apps you use. Social media apps like Instagram, TikTok, and Facebook often build up the largest caches — sometimes 500 MB to 2 GB per app if you have used them for months. Streaming apps like Netflix and YouTube also cache video data. Email apps, news apps, and web browsers typically use less.
Clearing cache for one heavily used app might free up 200 MB to 1 GB. Clearing cache for all apps at once could free up 2 to 5 GB on a phone that has been in use for a year or more. The exact amount depends on your phone model, how many apps you have, and how long you have owned the phone.
When to clear cache versus when to clear data
Cache is temporary files that apps rebuild automatically. Clearing it is safe and you will not lose anything important. Data includes your login information, saved settings, messages within the app, and other information you created. Clearing data will log you out and reset the app to its first-run state.
Clear cache whenever you want — it has no downside. Only clear data if an app is seriously broken and you want to start fresh, or if you are removing an app and want to erase everything it stored about you. Most of the time, clearing cache alone solves the problem.
What happens after you clear cache
Apps will take a few seconds longer to load the first time you open them after clearing cache, because they have to rebuild their temporary files. This slowdown is usually barely noticeable. After that first load, the app will run at normal speed again.
Your login information, passwords, and saved settings will not change. You will still be logged in to the app, your preferences will still be there, and any files or messages you created in the app will still exist. The only thing that changes is the temporary speedup data is gone.
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, documents, and anything else you created or saved will remain on your phone. Clearing cache only removes the temporary files.
Do I need to clear cache regularly?
Not necessarily. Most people clear cache once or twice a year, or when their phone is running low on storage. If your phone has plenty of free space and apps are running smoothly, you do not need to clear cache at all.
What is the difference between clearing cache and clearing data?
Cache is temporary files that apps rebuild automatically and is safe to clear. Data includes your login information, settings, and anything you created in the app. Clearing data logs you out and resets the app. Only clear data if an app is seriously broken or you want to erase everything it knows about you.
Will clearing cache make my phone faster?
It may help if your phone is running low on storage or if a specific app is slow or crashing. If your phone has plenty of free space and apps are running normally, clearing cache will not make a noticeable difference in speed.
Can I clear cache for just one app instead of all apps?
Yes. On Android, go to Settings > Apps, find the app, and tap Clear cache. On iPhone, you delete and reinstall the specific app. Clearing cache for one app is useful if only that app is slow or crashing.