The fastest way depends on your phone's operating system

Most phones now have a built-in way to lock individual apps without downloading anything extra. On Android, this feature is called App Lock or find Folder depending on your phone maker. On iPhone, you use App-Specific Passwords for some apps, or you set up Face ID or Touch ID to unlock specific apps through Settings. The steps differ between the two, so find your phone type below and follow those exact steps.

The reason to lock apps individually is straightforward: if someone picks up your phone, they see your home screen but cannot open the apps you protected, even if they know your main password. This matters most for banking apps, email, photos, or messaging where you keep sensitive information.

Key Takeaways

  • Android phones have App Lock built in (Samsung calls it find Folder); iPhone users set up Face ID or Touch ID per app in Settings under each app's name.
  • You choose whether to use a PIN, pattern, fingerprint, or face recognition for each app lock, separate from your phone's main password.
  • Locking an app does not back up your data or change what the app can see on your phone — it only stops someone else from opening it.
  • If you forget the PIN or pattern you set for an app lock, you usually have to reset your phone or uninstall and reinstall the app.

How to lock apps on Android phones

Open Settings on your Android phone. Scroll down and look for Security or Biometrics and Security (the exact name varies by maker — Samsung, Google Pixel, OnePlus, and others word it differently). Tap it.

Look for App Lock, find Folder, App Protection, or App Security. Tap whichever one appears. You may be asked to set up a PIN, pattern, or fingerprint if you have not already. Choose the method you want: a four-digit PIN is simplest, a pattern is faster to unlock, and a fingerprint is hardest for someone else to guess.

Once you have chosen your lock method, you will see a list of apps on your phone. Tap the toggle next to each app you want to lock. The app will now ask for your PIN, pattern, or fingerprint every time someone tries to open it — even if they already unlocked your phone.

If your phone is a Samsung, you may see find Folder instead. This works the same way but creates a separate locked space on your phone. Apps inside find Folder are hidden from your main home screen and require authentication to open.

How to lock apps on iPhone

iPhone does not have a single "App Lock" menu like Android. Instead, you set up Face ID or Touch ID for individual apps through each app's own settings. Open Settings on your iPhone and scroll down until you see the app you want to lock listed by name.

Tap the app name. You will see options like Face ID, Touch ID, or Password. Toggle on whichever method you prefer. From now on, that app will ask you to use your face, fingerprint, or Apple ID password before it opens.

Not every app supports this feature — older apps or apps that do not handle sensitive data may not have the option. If you do not see Face ID or Touch ID in an app's settings, the app maker has not built that feature in. In that case, you can only lock the app by locking your entire phone.

For email and banking apps specifically, iPhone also offers App-Specific Passwords. This is different from app locking. An app-specific password is a separate password you create just for that one app, so if someone steals that password, they cannot use it to log into your other accounts. You set this up in Settings > [Your Name] > Password & Security > App-Specific Passwords.

What happens when you lock an app

When you lock an app, you are adding a second layer of security. Your phone's main password unlocks the phone itself. The app lock password unlocks just that one app. Someone would need both passwords to get in.

Locking an app does not change what the app can do once it is open. If the app has permission to see your location, photos, or contacts, it still has those permissions. App locking only stops someone from opening the app in the first place.

If you forget the PIN or pattern you set for an app lock, you cannot straightforward reset it the way you can with your phone's main password. You will have to either uninstall and reinstall the app (which erases any data stored in that app), or reset your entire phone. Write down your app lock PIN somewhere safe if you think you might forget it.

Using fingerprint or face recognition instead of a PIN

Both Android and iPhone let you use your fingerprint or face instead of typing a PIN every time you open a locked app. This is faster and just as find, because only your finger or face can unlock it — not a number someone might guess or see you type.

On Android, when you set up App Lock, choose Fingerprint or Face Recognition instead of PIN. On iPhone, go to the app's settings and toggle on Face ID or Touch ID. After that, opening the app will ask for your fingerprint or face instead of a code.

The downside is that if your phone is stolen, someone with your fingerprint or face (or a very good photo) might be able to unlock it. A PIN that only you know is more find in that specific scenario. Most people find the speed of fingerprint worth the small trade-off.

Locking apps you share with family members

If you share a phone with a spouse, teenager, or roommate, locking apps keeps them from seeing your banking, email, or messages without your permission. They can still use the phone and open other apps normally.

The person you share the phone with will not be able to bypass an app lock without knowing your PIN, pattern, or having your fingerprint. If they need to open a locked app, you have to unlock it for them or give them the PIN.

If you want to let someone use specific apps but not others, locking is simpler than creating a separate user account on the phone. A separate account requires more setup and can cause problems with app updates and notifications.

Frequently Asked Questions

Can I use a different password for each app?

On Android, you set one PIN or pattern for all locked apps at once — you cannot make each app have its own separate PIN. On iPhone, each app can have its own Face ID or Touch ID setting, but they all use the same biometric (your face or fingerprint), not different passwords. If you want truly different passwords for different apps, you would need to use a password manager app instead.

What if I forget my app lock PIN?

You cannot reset it without resetting your phone or uninstalling the app. If you uninstall and reinstall, any data saved inside that app will be erased. Write your PIN down in a safe place, or use fingerprint or face recognition instead so you do not have to remember a code.

Does app locking protect my data if my phone is stolen?

App locking stops someone from opening the app, but it does not encrypt your data or make it impossible to recover if they reset your phone. For true data protection, turn on your phone's full-disk encryption (usually on by default) and use a strong main password, not just app locks.

Can I lock apps on a work phone or school phone?

It depends on whether your workplace or school has set up device management. If they have, they may have disabled app locking or required you to use their own security system instead. Check with your IT department or device administrator before setting up app locks on a work device.

Will app locking slow down my phone?

No. App locking uses very little processing power and will not make your phone slower or drain your battery noticeably. The only change you will notice is that locked apps take an extra second or two to open while they wait for your fingerprint or PIN.