The difference between deleting and uninstalling
When you delete an app, you remove the program itself from your device. On most phones and computers, this also removes the files the app created — but not always. Some apps leave behind settings, cached data, or login information even after you remove the program. A complete deletion means removing both the app and everything it stored.
Why this matters: if you reinstall the same app later, it may remember your old settings or login. If you're selling the device or giving it away, leftover app data could contain personal information. If an app is malfunctioning, old cached files sometimes cause the problem to persist even after you reinstall.
Key Takeaways
- On iPhone, deleting an app from the home screen removes the program, but Settings > General > iPhone Storage shows which apps are taking up space and lets you remove them completely.
- On Android, long-press the app icon, tap Uninstall, then go to Settings > Apps to clear the app's cached data and stored files separately.
- On Windows, use Settings > Apps > Apps & Features to uninstall, then search for leftover folders in Program Files and AppData to delete manually.
- On Mac, dragging an app to Trash removes the program but not its support files — use the Library folder or a dedicated uninstaller app to remove everything.
- Some apps cannot be uninstalled because they came with the device; you can only disable them or remove updates to free up space.
Deleting apps on iPhone
On iPhone, you can delete an app by long-pressing its icon on the home screen, then tapping Remove App and confirming. This removes the app from your screen, but the program itself may still be on your device taking up storage space.
To see what apps are using space and remove them completely, go to Settings > General > iPhone Storage. This screen lists every app by size. Tap any app and you'll see two options: Offload App (removes the program but keeps your data) or Delete App (removes both). Choose Delete App to remove it entirely. After deletion, the app no longer appears in your library and takes up no storage.
If you want to remove the app's leftover data — login information, cached files, settings — you'll need to go to Settings > Apps and find the app in your list. Not all apps appear here, but ones that do will show a storage size. Tap it and select Delete to clear everything associated with that app.
Deleting apps on Android
On Android, long-press an app icon and tap Uninstall, then confirm. This removes the program from your device. However, some of the app's data remains in your phone's storage — things like login sessions, cached images, and settings.
To remove that leftover data, go to Settings > Apps (or Application Manager, depending on your phone). Find the app you just uninstalled — it may still appear in the list. Tap it and look for buttons labeled Clear Cache or Clear Data. Tap both to remove everything the app stored. If the app is no longer in the list, it has been completely removed.
Some apps that came with your phone cannot be uninstalled. Instead, you'll see a Disable button. Tapping this removes the app from your home screen and stops it from running, but it stays on your device. To free up space, go to Settings > Apps, find the app, and tap Clear Cache and Clear Data. This removes the app's stored information without removing the program itself.
Deleting apps on Windows
On Windows 10 or 11, go to Settings > Apps > Apps & Features. Scroll to find the app you want to remove, click it, and select Uninstall. Follow the prompts to remove the program. This deletes the main application files, but some apps leave behind folders and settings in hidden locations.
To find and remove these leftover files, open File Explorer and navigate to C:\Users\[Your Username]\AppData. This folder contains three subfolders: Local, LocalLow, and Roaming. Each one may hold data from the app you just uninstalled. Search for the app's name or company name in each folder and delete any matching folders you find.
You should also check C:\Program Files and C:\Program Files (x86) for any remaining app folders. If you see a folder with the app's name, right-click it and delete it. After removing files from all three locations, the app is completely gone from your computer.
Deleting apps on Mac
On Mac, the simplest way to remove an app is to open Finder, go to Applications, find the app, and drag it to Trash. Empty the Trash afterward. However, this only removes the application itself — not the files it created elsewhere on your computer.
Apps on Mac store data in the Library folder, which is hidden by default. To access it, open Finder, click the Go menu at the top, hold down Option, and select Library. Inside, look for folders named after the app or its company. Delete any you find. You should also check ~/Library/Preferences, ~/Library/Caches, and ~/Library/Application Support for app-related files.
If you're unsure which files belong to the app, consider using a dedicated uninstaller app like AppCleaner (free) or CleanMyMac (paid). These apps scan your computer, find all files associated with a program, and remove them in one step. This is faster and more thorough than manual deletion, especially for complex applications.
Apps that cannot be fully deleted
Some apps come pre-installed on your device and cannot be uninstalled. On iPhone, these include Mail, Calendar, Maps, and Stocks. On Android, pre-installed apps vary by manufacturer and carrier. On Windows, some system apps like Settings and File Explorer cannot be removed.
For apps you cannot uninstall, you can still free up space by clearing their cached data. On iPhone, go to Settings > General > iPhone Storage, tap the app, and select Offload App. On Android, go to Settings > Apps, tap the app, and select Clear Cache and Clear Data. This removes the app's stored information without removing the program, freeing up several gigabytes of space in many cases.
Checking that an app is completely removed
After you delete an app, verify it's gone by checking your device's storage. On iPhone, go to Settings > General > iPhone Storage and search for the app's name — it should not appear. On Android, go to Settings > Apps and search for it. On Windows, go to Settings > Apps > Apps & Features and scroll through the list. On Mac, open Applications in Finder and look for it.
You can also check by searching your device for the app's name. On iPhone and Android, use the search function on your home screen. On Windows, use the search box in the taskbar. On Mac, use Spotlight (Command + Space). If nothing comes up, the app has been completely removed.
Frequently Asked Questions
Will deleting an app remove my account or login information?
Deleting the app removes the program, but your account information may remain on the company's servers. If you reinstall the app, you can usually log back in with the same username and password. To remove your account entirely, you'll need to visit the company's website or contact their support team — deleting the app alone does not close your account.
Can I recover an app after I delete it?
Yes. On iPhone, go to the App Store, search for the app, and tap the cloud icon to reinstall it. On Android, open Google Play, search for the app, and tap Install. On Windows, go to the Microsoft Store or the app's official website. On Mac, check the App Store or the developer's website. Your data may or may not be restored depending on whether you cleared it before deleting.
Why does an app still take up storage after I uninstall it?
The app's cached data, settings, or support files are still on your device. Go to your device's storage settings, find the app in the list, and tap Clear Cache or Clear Data. If the app no longer appears in your apps list but still shows in storage, restart your device — sometimes the storage count takes time to update.
What's the difference between clearing cache and clearing data?
Clearing cache removes temporary files the app created to run faster, like downloaded images or web pages. Clearing data removes everything — cache, settings, login information, and saved files. If you want to keep your login information but free up space, clear cache only. If you want to remove all traces of the app, clear data.
Do I need to uninstall an app before selling my phone?
Yes. Before selling or giving away any device, uninstall all apps and clear their data. Then perform a factory reset — on iPhone, go to Settings > General > Reset > Erase All Content and Settings; on Android, go to Settings > System > Reset Options > Erase All Data. This removes all personal information and ensures the new owner starts with a clean device.