To lock apps on Android, use the built-in lock on your phone first. On Samsung, put the app in Secure Folder and lock it with a PIN, pattern, or fingerprint. On Xiaomi, open Settings, then Apps, then App Lock, and set a pattern. Android 15 users can move apps into Private Space, a separate lockable area. If your phone has no built-in lock, use a trusted app locker like AppLock.
Locking apps keeps your private chats, photos, and banking apps safe when someone else holds your phone. A friend can borrow your phone for one small task and still reach your messages. A lock screen alone does not stop this. The phone is already unlocked when you hand it over. An app lock adds a second wall. Each private app asks for a fingerprint or PIN before it opens.
Android 15 added Private Space, a separate lockable area for apps (source: Google, Android 15). The Android 17 beta adds a native per-app lock for Pixel phones (source: PhoneArena, November 2026). These built-in locks run inside the system and need fewer permissions. AppLock by SpSoft has over 50 million downloads on Google Play (source: Google Play listing, October 2026).
Answer Box 1 The best way to lock apps on Android is the built-in lock on your phone. Samsung users should use Secure Folder, Xiaomi users App Lock, and Android 15 users Private Space. Pixel users can try the native per-app lock in the Android 17 beta. If your phone has no built-in lock, install AppLock by SpSoft.
Why Lock Apps on Android?
A phone lock protects your phone, but an app lock protects what sits inside it. You hand your phone to a friend to show a photo. That friend can open your messages by accident. You lend your phone to a child to play a game. The child can open your banking app or your shopping app. Each case is common, and each one is stopped by a simple app lock.
App locks also protect you when your phone is lost or stolen. A thief who finds an unlocked phone can open your email, reset your passwords, and reach your bank. A locked banking app and a locked email app slow the thief down. They buy you time to lock the phone remotely. A lock is not a full security plan on its own. It is a strong extra layer that costs nothing to set up.
Not every app needs a lock, and locking too many apps can slow you down. Lock the apps that hold money, private chats, photos, or work files. Leave games and news apps open. Pick five to ten apps that truly matter, and lock only those. If you also want to hide apps from view, read how to hide apps on Android. It covers hiding methods that pair well with locks.
Built-In App Locks vs Third-Party Lockers
Built-in locks come from your phone maker or from Google. They run inside the system with no extra app to install. Samsung Secure Folder uses Knox security. Xiaomi App Lock sits inside Settings, and Private Space is part of Android 15 itself. These locks are stable, use little battery, and rarely show ads.
Third-party lockers like AppLock work on almost any Android phone. They add extras such as intruder selfies and fake crash screens. They install from Google Play and lock any app with one tap. The trade-off is trust, because a locker needs deep permissions to watch which apps you open. A locker can also show ads, drain battery, or stop working after a system update. Only install a locker with millions of downloads and a clear privacy policy.
| Feature | Built-in lock | Third-party locker |
|---|---|---|
| Needs an extra app | No, it is in the system | Yes, install from Google Play |
| Battery use | Very low | Low to medium, varies by app |
| Ads | None | Often shows ads in the free version |
| Intruder selfie | Rarely included | Often included, as in AppLock |
| Works on any phone | No, depends on brand | Yes, on most Android phones |
| Best for | Daily use on Samsung, Xiaomi, Pixel | Phones with no built-in lock |
Choose a built-in lock whenever your phone offers one, because it is safer and simpler. Use a third-party locker only when your phone has no built-in option. Never install two lockers at once, because they can fight over the same app and lock you out. If you lock an app and later hide it too, read the Samsung guide. See how to hide apps on Samsung for how hiding and locking work together on Galaxy phones.
How to Lock Apps on Android: 7 Best Ways
The seven methods below start with the safest built-in locks and end with the best third-party option. Try the method that matches your phone brand first, because it needs no download and no extra permissions. Each method locks the app behind a fingerprint, PIN, or pattern. Fingerprint is fastest for daily use, while a PIN works when your hands are wet or dirty.
1. How to Lock Apps on Android on Samsung
Open Settings, tap Security and privacy, then tap Secure Folder and set a PIN, pattern, or password. Add your fingerprint as well, so you can unlock the folder with one touch. Tap Add apps inside Secure Folder and choose the apps to protect, such as banking, messages, and photos. Secure Folder uses Samsung Knox security. It keeps a separate copy of each app inside the locked folder. Remove the normal icon if you want only the locked copy to show.
2. Lock Apps With Xiaomi App Lock
Open Settings, tap Apps, then tap App Lock, and set a pattern when the phone asks. Turn on fingerprint unlock as well, so you can open locked apps with one touch. Tap the apps you want to lock, such as WhatsApp, Gallery, and your banking app. They will ask for the pattern each time they open. Xiaomi App Lock sits inside the system, so it needs no download and shows no ads.
3. Lock Apps With OnePlus App Locker
Open Settings, tap Privacy, then tap App Locker, and set a password or pattern. Turn on fingerprint unlock, then choose the apps you want to lock from the list. Locked apps show a small lock icon in the app drawer. They ask for your fingerprint each time you open them. OnePlus App Locker is built into OxygenOS, so it runs smoothly and uses very little battery.
4. Lock Apps With Android 15 Private Space
Open Settings, tap Security and privacy, then tap Private Space and set it up with a Google account. Choose a lock type, such as a PIN or fingerprint. Then pick which apps to move into the space. Private Space is a separate lockable area. Its apps hide from search, notifications, and the main drawer until you unlock it. Move your banking app, private chats, and photo app into the space. It is the strongest built-in lock.
5. Lock Apps With the Android 17 Native Per-App Lock
On a Pixel 7 to Pixel 11 phone with the Android 17 beta, long-press any app icon. Tap App Lock in the menu, then confirm with your fingerprint or PIN to lock that app. The app will ask for your fingerprint each time you open it. Its content hides from recent apps and notifications. Android 17 beta adds a native per-app lock on Pixel phones (source: PhoneArena, November 2026). Because it is still in beta, the feature may change before the final release.
6. Lock WhatsApp With Its Own Fingerprint Lock
Open WhatsApp, tap the three dots, then tap Settings, then Privacy, then App lock. Turn on Unlock with biometric authentication and choose whether the lock starts at once or after a delay. WhatsApp added its own fingerprint lock for Android in 2019 (source: WhatsApp / Biometric Today). This lock works on any Android phone, even if the phone has no built-in app lock. It protects only WhatsApp, so use it alongside a system lock for your other private apps.
7. Lock Apps With AppLock by SpSoft
Open Google Play, search for AppLock by SpSoft, and install the app with over 50 million downloads. Open AppLock, set a pattern or PIN, and grant the permissions it asks for. It needs them to watch app launches. Choose the apps to lock, and turn on the intruder selfie feature. It takes a photo of anyone who enters the wrong code. Use AppLock only when your phone has no built-in lock, because a system lock is safer.
Answer Box 2 Pick the lock that matches your phone and lock only the apps that hold private data. Samsung users should start with Secure Folder, Xiaomi users with App Lock, and Pixel users with the Android 17 per-app lock. Always add a fingerprint as well as a PIN, so you have a second way in. Never install two locker apps at once.
Mistakes to Avoid When You Lock Apps on Android
The first mistake is forgetting the lock pattern or PIN. It can lock you out of your own banking app. Always add a fingerprint as a second unlock method. Save the PIN in a safe place outside your phone. The second mistake is locking the wrong app, such as your launcher or your Settings app. That can make the phone hard to use. Lock only the apps that hold private data, and leave system apps alone.
Another common mistake is installing a locker from outside Google Play. Sideloaded lockers can carry malware and steal your data. A further mistake is using a locker that drains the battery by running in the background all day. Check battery use in Settings after a week. A last mistake is locking apps on a work phone. Your employer may block locker apps or wipe the phone remotely. Ask your IT team before you install a locker on a work phone.
What to Do If You Forget Your App Lock
Stay calm, because most locks offer a reset path that does not delete your data. On Samsung, open Secure Folder and use your Samsung account to reset the lock type. On Xiaomi, tap Forgot password on the App Lock screen and sign in with your Mi account. For Private Space, unlock it with the Google account you used during setup. For WhatsApp, you can only wait out the lock delay or reinstall the app. A reinstall may delete local chat history without a backup.
If no reset path works, do not guess codes again and again. Too many wrong tries can lock the app for hours. Back up your phone first, then reinstall the locker app to clear its lock. As a last step, move your private files to a safe place before you reset anything. To keep proof of your settings for next time, read how to screenshot on Android. You can also check how to unhide apps on Android. Use it if a locked app seems to have vanished from view.
Frequently Asked Questions
How do I lock apps on Android without an app?
Use the built-in lock on your phone, because most brands include one. Samsung has Secure Folder, Xiaomi has App Lock in Settings, and OnePlus has App Locker. Android 15 adds Private Space for all brands.
Does Android have a built-in app lock?
Yes, but it depends on your phone brand and Android version. Samsung, Xiaomi, and OnePlus each ship their own lock, and Android 15 adds Private Space for all brands.
How do I lock apps on Samsung?
Open Settings, tap Security and privacy, then tap Secure Folder and set a PIN or fingerprint. Tap Add apps inside the folder and choose the apps you want to protect. The locked copy runs apart from the normal app, so its data stays private.
How do I lock apps on Xiaomi?
Open Settings, tap Apps, then tap App Lock, and set a pattern. Turn on fingerprint unlock as well, then tap the apps you want to lock. Locked apps ask for the pattern each time they open.
What is Private Space on Android 15?
Private Space is a separate lockable area for apps, built into Android 15 by Google. Apps inside it hide from search, notifications, and the main drawer until you unlock the space. It works like a second drawer with its own lock, so it suits banking apps and private chats.
Can I lock WhatsApp with a fingerprint?
Yes, open WhatsApp, tap Settings, then Privacy, then App lock, and turn on biometric unlock. WhatsApp added its own fingerprint lock for Android in 2019, so it works on almost any Android phone.
What is the best app lock for Android?
The best lock is the built-in one on your phone, because it is safer and uses less battery. Samsung Secure Folder, Xiaomi App Lock, and Android 15 Private Space lead the list.
Is AppLock safe to use?
AppLock by SpSoft is widely used and comes from Google Play. Any locker needs deep permissions to work, though. Install it only from Google Play, read its privacy policy, and grant only the permissions it truly needs.
Can I lock apps on a Pixel phone?
Yes, if your Pixel runs the Android 17 beta, long-press any app icon and tap App Lock. The app then asks for your fingerprint each time it opens. On older Android versions, Pixel phones have no built-in lock. Use Private Space on Android 15 or a trusted locker instead.
Will an app lock drain my battery?
A built-in lock uses almost no extra battery, because it runs inside the system. A third-party locker can use more battery, since it watches every app launch in the background.
How do I unlock a locked app?
Open the locked app and unlock it with your fingerprint, PIN, or pattern. The app opens as normal once the lock clears. If you want the app unlocked for good, open the lock settings. Remove the app from the locked list there.
Can I lock apps on a work phone?
It depends on your employer, because managed phones may block locker apps or wipe the phone remotely. Ask your IT team before you install a third-party locker on a work phone. Use only the built-in lock if your employer allows it. Never lock work apps in a way that blocks your job.
Learn more about fingerprint recognition on Wikipedia: Fingerprint recognition