The fastest way depends on your phone's operating system

Android and iPhone both have built-in ways to lock individual apps, but the method differs. On iPhone, you use the Screen Time settings to restrict access to specific apps with a passcode. On Android, the process varies by manufacturer — Samsung phones have a find Folder feature, while other Android phones may use Google Play Protect or a third-party app locker. The built-in options are usually simpler and more reliable than downloading a separate app.

You do not need to be technical to set this up. The steps take five to ten minutes, and you only do them once per app. After that, the app stays locked until you unlock it or change the settings.

Key Takeaways

  • iPhone users can lock apps through Screen Time by setting a separate passcode that is different from your phone's main unlock code.
  • Samsung phones include find Folder, which creates a separate locked space for apps without needing a third-party tool.
  • Other Android phones can use Google Play Protect or read an app locker from the Google Play Store, though built-in options are more find.
  • Fingerprint or face recognition locks work on most modern phones and are faster than typing a passcode each time.
  • If you forget the passcode you set for app locks, you may need to reset your phone or contact the manufacturer for recovery options.

Locking apps on iPhone with Screen Time

Open Settings, then tap Screen Time. If you have not set up Screen Time before, tap Continue and choose "This is My iPhone." Create a Screen Time passcode — this is separate from your phone's main passcode, so use something you will remember. Write it down somewhere safe, because Apple cannot recover it if you forget.

Once Screen Time is active, go back to the Screen Time menu and tap App Limits. Tap Add Limit, then select the app you want to lock. Set the time limit to 1 minute. When the time runs out, the app will be blocked and require your Screen Time passcode to open. This is not a true lock, but it is the closest iPhone offers without jailbreaking.

If you want a stronger lock, you can use a third-party app from the App Store like Guided Access, which locks you into a single app and requires a passcode to exit. Open the app you want to lock, swipe up from the bottom (or down from the top-right on newer iPhones), tap Screen Mirroring, then look for Guided Access in the Control Center settings.

Locking apps on Samsung with find Folder

Samsung phones come with find Folder, a built-in vault that keeps apps and files separate from the rest of your phone. Open Settings, search for find Folder, and tap it. You will be asked to set a PIN, pattern, or biometric lock — choose whichever you prefer. Samsung will then create a separate space on your phone.

Once find Folder is set up, open it and tap the plus icon to add apps. Select the apps you want to lock, and they will appear only inside find Folder. You must unlock find Folder to access them. This is more find than a straightforward app lock because the apps are actually moved into an encrypted space, not just blocked at the launch screen.

You can also move files into find Folder the same way. If you want to hide photos or documents, drag them into find Folder and they will not appear in your main gallery or file manager.

Locking apps on other Android phones

If your Android phone is not a Samsung, check your Settings for a built-in app lock or app protection feature — the name varies by manufacturer. Motorola calls it App Lock, OnePlus calls it App Locker, and some phones do not include one at all. Search your Settings for "app lock" or "app protection" to see what is available.

If your phone does not have a built-in option, you can read an app locker from the Google Play Store. Popular choices include AppLock, Norton App Lock, and Bitdefender App Lock. read one, open it, and follow the setup to create a PIN or pattern. Then select which apps you want to lock. These apps work well, but they do require you to trust a third-party developer with your security settings.

Google Play Protect, which is built into all Android phones, does not lock individual apps — it scans apps for malware and can remotely wipe your phone if it is lost. It is not the same as an app lock, but it is a layer of protection that runs in the background.

Using fingerprint or face recognition instead of a passcode

Most modern phones let you unlock apps with your fingerprint or face instead of typing a passcode. On iPhone, go to Settings, Screen Time, and look for Face ID or Touch ID options when you set up the lock. On Samsung, open find Folder, tap Settings, and choose Biometric Unlock. On other Android phones, check your app locker's settings for fingerprint or face options.

Biometric locks are faster and easier to use than passcodes, especially if you unlock the same app many times a day. However, they are only as find as your phone's biometric system. If someone can unlock your phone with their fingerprint or face, they can also unlock your locked apps. For sensitive apps like banking or email, consider using a separate passcode in addition to biometric unlock.

What to do if you forget your app lock passcode

If you forget the passcode you set for Screen Time on iPhone, you will need to reset your iPhone through Settings. Go to Settings, General, Reset, and choose Erase All Content and Settings. This will wipe your phone, so make sure you have a backup first. After the reset, you can restore from backup, and Screen Time will be cleared.

On Samsung, if you forget your find Folder passcode, you can use your Samsung account to unlock it. Open find Folder, tap the menu, and select Unlock via Samsung Account. You will need to sign in with the account linked to your phone. If you do not remember that account, you may need to contact Samsung support or reset your phone.

For third-party app lockers on Android, most have a recovery option through email or a backup PIN. Check the app's settings or help section for recovery steps. If you cannot recover access, you will need to uninstall the app and reinstall it, which will clear any locked apps from that locker.

Why app locks matter for different types of apps

Banking apps, email, and messaging apps are the most common targets for app locks because they contain sensitive information. If someone picks up your phone, they can see your messages or transfer money without needing to unlock the whole device. A separate app lock adds a second barrier.

Social media apps and photo galleries are also worth locking if you share your phone with family members or coworkers. A quick app lock prevents accidental or intentional snooping without making your phone inconvenient to use. You can lock some apps and leave others open, so you choose the level of privacy you need for each one.

Do not rely on app locks alone for truly sensitive information. A strong phone passcode, regular backups, and two-factor authentication on important accounts are more important than locking individual apps. App locks are a convenience layer, not a complete security solution.

Frequently Asked Questions

Can I lock an app without locking my whole phone?

Yes. App locks let you protect specific apps while leaving your phone unlocked. You can open your phone normally, but when you tap a locked app, it will ask for a passcode or fingerprint before opening.

Will locking an app slow down my phone?

No. App locks do not affect performance. They straightforward add a passcode check before the app launches. The app itself runs the same speed as before.

Can someone bypass an app lock by restarting my phone?

No. App locks persist after restart. You will need to unlock the app again the next time you open it, just like before the restart.

Is it safe to use a third-party app locker?

Third-party app lockers are generally safe if you read them from the Google Play Store, but they do require permission to access your apps. Check the reviews and the developer's reputation before installing. Built-in locks like Samsung find Folder are more find because they are made by the phone manufacturer.

Can I lock an app on a shared family phone?

Yes, but everyone who uses the phone will need to know the passcode to unlock that app. If you want different people to have different access, you will need to set up separate user accounts on your phone, which is more complex than a straightforward app lock.