What deleting app data actually does
When you delete an app's data, you erase the information that app has stored on your device — login details, saved preferences, cached files, game progress, and anything else the app remembers about how you use it. The app itself stays installed. The next time you open it, you'll be starting fresh, as if you'd just downloaded it for the first time.
This is different from uninstalling the app entirely. Deleting data is useful when an app is misbehaving, when you want to reset your account without losing the app, or when you need to free up storage space. Most people delete app data to fix a frozen or crashing app, or to clear out login information before selling or giving away a device.
On most devices, app data sits in a hidden folder that you can't see in your normal file browser. That's why the process requires going through your device's settings rather than just dragging files to trash.
Key Takeaways
- Deleting app data erases everything the app remembers about you — passwords, settings, game saves — but leaves the app itself installed and ready to use.
- On Android, go to Settings > Apps, find the app, tap Storage, then tap Clear Cache or Clear Storage depending on what you want to remove.
- On iPhone, you must delete and reinstall the app to clear all its data, or use Settings > General > iPhone Storage to offload the app temporarily.
- Clearing cache removes temporary files and usually frees up less space, while clearing all data removes everything and frees up more space.
- You cannot recover app data once it's deleted, so make sure you've saved anything important before you proceed.
How to delete app data on Android
Open your device's Settings app. Scroll down and tap Apps (sometimes called Applications or App Management depending on your phone brand). Find the app you want to clear data from and tap its name.
You'll see two options: Clear Cache and Clear Storage (or sometimes Clear Data). Tap Clear Cache if you only want to remove temporary files the app created — this frees up some space and often fixes minor glitches without erasing your login or settings. Tap Clear Storage if you want to erase everything, including saved passwords and preferences. The app will ask you to confirm; tap OK or Clear to proceed.
After you clear data, the app remains on your phone and you can open it immediately. You'll need to log back in if you cleared storage, and any saved settings or game progress will be gone.
How to delete app data on iPhone
iPhone doesn't have a "clear app data" button the way Android does. To erase everything an app has stored, you must delete the app and reinstall it. Open Settings, tap General, then tap iPhone Storage. Find the app in the list and tap it. Tap Delete App, then confirm by tapping Delete App again.
Once the app is deleted, go to the App Store, search for the app by name, and tap the cloud icon with a down arrow to reinstall it. When you open it, it will have no memory of your previous use — no saved logins, no settings, no data of any kind.
If you want to free up space without fully deleting the app, you can tap Offload App instead of Delete App. This removes the app but keeps your data. When you reinstall it, your settings and logins will still be there. This option is useful if you're low on storage but want to keep your app configured the way you like it.
The difference between clearing cache and clearing all data
Cache is temporary storage — files the app downloaded to make it run faster next time. Clearing cache usually frees up a few hundred megabytes at most and doesn't erase your personal information. It's the safer choice if you're just trying to fix a slow or crashing app.
All data (or storage) includes cache plus everything else: your login credentials, saved preferences, game progress, message history, and any files the app created. Clearing all data frees up more space and completely resets the app, but you lose everything. Only choose this if you're certain you don't need any of that information, or if you've saved it somewhere else first.
Many people clear cache first, restart the app, and see if that solves the problem. If the app still misbehaves, then they clear all data. This approach saves you from losing information unnecessarily.
When to delete app data to fix problems
If an app is frozen, crashing repeatedly, or running slowly, clearing its cache often fixes it. The app may have created corrupted temporary files, and removing them forces the app to rebuild them fresh the next time it runs. This takes just a few seconds and doesn't require you to log back in.
If clearing cache doesn't work, try clearing all data. This resets the app completely, which solves problems caused by corrupted settings or conflicting preferences. You'll need to log in again and reconfigure the app, but it usually runs normally after that.
If an app still misbehaves after clearing all data, the problem is likely with the app itself or your device's operating system, not with stored data. At that point, try restarting your phone, updating the app through your app store, or uninstalling and reinstalling the app entirely.
Freeing up storage space by clearing app data
Apps accumulate data over time — cached images, downloaded files, temporary data from updates. If your device is running low on storage, clearing app data can free up gigabytes of space without deleting the apps you use.
Start with apps you use infrequently. Social media apps, streaming services, and games tend to store the most data. Go through your apps one by one and clear cache on all of them, then clear storage on the ones you don't mind resetting. Check your device's storage settings before and after to see how much space you've recovered.
On Android, you can see how much data each app is using in Settings > Apps > [App Name] > Storage. On iPhone, go to Settings > General > iPhone Storage to see a ranked list of which apps are taking up the most space. This helps you decide which apps to clear first.
What you should know before deleting app data
Deleted data cannot be recovered. Once you clear an app's storage, that information is gone permanently. If the app stored anything important — login credentials you didn't write down, photos you didn't back up, messages you wanted to keep — make sure you've saved it somewhere else before you proceed.
Some apps sync data to the cloud automatically. If you clear data on an app like Gmail or Google Photos, the information is still safe on Google's servers and will reappear when you log back in. Other apps, like games or note-taking apps, may not sync, so clearing their data means losing everything.
If you're preparing to sell or give away your device, clearing app data is a good security step, but it's not enough on its own. You should also sign out of all accounts, remove payment methods, and perform a full factory reset of your device to ensure no personal information remains.
Frequently Asked Questions
Will deleting app data delete the app itself?
No. Deleting app data removes only the information the app has stored — your logins, settings, and files. The app remains installed on your device and you can open it immediately after clearing data. You'll need to log in again if you cleared all storage, but the app itself is still there.
Can I recover app data after I delete it?
No, deleted app data cannot be recovered. Once you clear storage, that information is permanently gone. If the app syncs to the cloud (like Gmail or OneDrive), your data is still safe on the cloud service and will reappear when you log in. For other apps, make sure you've backed up anything important before you clear data.
How much space will I free up by clearing app data?
It varies by app. Social media and streaming apps often store gigabytes of cached images and videos. Games can store hundreds of megabytes of temporary files. Check your device's storage settings to see how much each app is using before you clear it. Clearing cache frees up less space than clearing all data.
Should I clear cache or clear all data?
Start with clearing cache. It removes temporary files, often fixes minor app problems, and doesn't erase your logins or settings. Only clear all data if clearing cache didn't solve the problem, or if you're resetting the app intentionally and don't mind losing your saved information.
Do I need to restart my phone after clearing app data?
No, restarting is not required. The app will work normally the next time you open it. However, if you're clearing data to fix a problem, restarting your phone afterward sometimes helps, especially if multiple apps are misbehaving.