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How to lock apps on Android without an app

Stock Android has no setting that puts a password on any app you choose. What it has is a handful of narrower tools: a hidden space for apps, a handover mode, and locks that individual apps add themselves. Here is what each one does, and where it stops.

1. Private space (Android 15 and later)

This is the closest built-in answer to “lock apps”. Go to Settings > Security & privacy > Private space, confirm your screen lock, then tap Set up. You can reuse your screen lock or choose a separate one. Apps you install inside it are hidden from search, the launcher and recents while it is locked, and they are fully stopped, so they cannot show notifications. (Google: private space)

The limits matter. You cannot move an existing app’s data into it. It is not included in device backups. If you forget its lock, you cannot recover it, only delete it. And Google says it cannot always hide that the space exists. It also needs a phone that runs Android 15 or later and does not turn it off.

2. Secure Folder on Samsung

Galaxy phones have their own version. Open Settings > Security and privacy > More security settings > Secure Folder and pick a PIN, password or pattern. Apps and files you add live in a separate area with a lock of its own. (Samsung: Use Secure Folder) Samsung’s support pages reviewed for this post do not describe a separate per-app “App lock” setting, so treat Secure Folder as the Samsung answer. For how it compares with Private space, see Private space vs Secure Folder.

3. Screen pinning, for handing over your phone

Pinning does not lock an app. It keeps someone inside one. Turn it on under **Settings

Security** (or Security & location) > Advanced > App pinning. The menu name varies by maker. Then open the app, go to Overview, tap the app’s icon and choose Pin. The other person can use only that app until you unpin, and Google says you must enter your PIN, pattern or password to unpin. (Google: pin and unpin screens)

It suits a child watching a video or a friend looking at one photo. It does nothing once the phone is locked and handed back.

4. Locks inside specific apps

Some apps carry their own lock. These protect that app’s content only.

Banking and password-manager apps often have their own biometric prompt too. Check each app’s settings.

What none of this does

None of these is a universal lock. You cannot pick Instagram or Gallery and require a fingerprint every time it opens. Private space and Secure Folder lock a separate area, so the app has to be installed there. Pinning is temporary. App-specific locks only cover their own app. Several of them use your screen lock, so anyone who knows your phone PIN gets in.

When a vault fits

If what you want to protect is the files, not the app, locking the app is the wrong tool. A vault encrypts the photos, videos and documents themselves. VaultIt does this on the device with AES-256-GCM, with the key made from a drawn pattern via Argon2id. It has a 12-word recovery phrase, an encrypted backup file you save yourself, no account and no ads. Nobody can reset your pattern. Uninstalling it or clearing its data deletes the vault, so only a backup kept off the phone survives.

Sources

Quick answers

Can I lock apps on Android without installing anything? Partly. Private space (Android 15+) and Samsung’s Secure Folder lock a separate area. Some apps have their own lock. There is no single per-app lock.

How do I lock an app on Android with a password in Settings? Settings has no per-app lock on stock Android. Use Private space, Secure Folder, or the app’s own privacy settings.

How do I stop someone using other apps when I hand over my phone? Turn on app pinning, pin the app, and unpin with your PIN, pattern or password.

Does Private space work on my phone? Only on Android 15 or later, and only if the maker has not disabled it.

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