Best App Lock Apps for Android (Plus Built-In Options)
Your phone holds your messages, photos, banking apps and social accounts — so locking individual apps adds a valuable second layer of privacy beyond your screen lock. Whether you're handing your phone to a child, sharing it with family, or just want sensitive apps protected, here are the best app lock options for Android, including powerful built-in tools and trusted third-party apps.
Start With Android's Built-In Tools
Before installing anything, check what your phone already offers — modern Android has strong privacy features baked in, and they're more secure than most third-party apps.
- Private Space (Android 15 and later): Creates a separate, lockable area on your phone for sensitive apps. Apps inside it are hidden from your app list and require authentication to open.
- Samsung Secure Folder: On Galaxy phones, this creates an encrypted, password- or biometric-protected space for apps, files and photos — one of the best app-lock solutions available.
- App pinning: Built into Android, this keeps a single app on screen until you unlock, ideal when handing your phone to someone briefly.
- Xiaomi, OnePlus & others: Many manufacturers include their own "App Lock" in Settings under Privacy or Security — no download needed.
These built-in spaces are also ideal when you regularly hand your phone to kids — for full device supervision, pair them with a dedicated parental control app.
Best Third-Party App Lock Apps for Android
If your phone lacks a built-in option or you want extra features, these reputable apps are popular choices:
1. AppLock by DoMobile
One of the longest-running and most downloaded app lockers, AppLock by DoMobile lets you protect apps with a PIN, pattern or fingerprint. It can also hide photos and videos in a private vault and take a photo of anyone who enters the wrong code. It’s free with ads — a paid Premium tier removes them and adds themes — and can lock system toggles like Wi-Fi and Bluetooth, plus disguise a locked app behind a fake “force-stop” screen. With hundreds of millions of installs, it’s the default choice for most people who want a full-featured locker.
2. AppLock — Fingerprint & Password (SpSoft / IvyMobile)
A lightweight, easy-to-use locker supporting fingerprint and password protection, with a clean interface and low battery impact. It also offers intruder selfies and a hidden, pattern-based unlock so the lock isn’t obvious to snoopers. Free with ads, it’s a good fit if you want core locking without the extra clutter some apps pile on.
3. Smart AppLock
Smart AppLock offers app locking plus extras like fake "force close" covers, intruder selfies and time- or location-based locking rules for more advanced control. You can set apps to unlock automatically on trusted Wi-Fi networks or at certain times of day, and it supports PIN, pattern, and fingerprint. It’s one of the more configurable options for power users who want granular rules.
4. Keepsafe
Keepsafe focuses on locking and encrypting your private photos and videos in a secure vault, rather than locking every app — a great choice if media privacy is your main concern. Files are encrypted and protected by a PIN or fingerprint, with extras like a fake PIN that opens a decoy vault and break-in alerts. The basics are free; a Premium subscription adds more storage and cloud backup.
5. Amarok (open-source)
If the permissions most app lockers demand make you uneasy, Amarok is the privacy-first answer. It’s a free, open-source app hider (on F-Droid and GitHub) that uses Shizuku instead of intrusive Accessibility access. Rather than just locking apps, it makes them vanish from your launcher and app list, and can disguise private files so they look corrupted and won’t open. Note that it hides rather than encrypts, and the Shizuku setup is slightly more technical — but for the security-conscious, it’s the most trustworthy pick here.
6. Smart Launcher 6
Smart Launcher 6 isn’t a dedicated locker but a full home-screen replacement with app hiding and locking built in. If you’re happy to switch launchers, you get PIN or biometric protection on chosen apps plus the ability to hide them from the app drawer — all without a separate app demanding extra permissions. A neat two-in-one if you already fancy a new launcher.
7. Calculator Vault apps (HideU and similar)
A popular category of “disguised” lockers that sit on your home screen as an ordinary calculator — type your PIN into the calculator to reveal a hidden vault of photos, videos, and apps. HideU is one of the better-known examples. They’re handy for hiding content in plain sight, but quality and ad levels vary widely, so check reviews and requested permissions carefully before trusting one with sensitive files.
Quick Comparison: Android App Lock Options
| Option | Lock methods | Intruder selfie | Vault / disguise | Price | Best for |
|---|---|---|---|---|---|
| Built-in (Private Space / Secure Folder) | PIN / pattern / biometric | — | Hidden space | Free | Safest, most private |
| AppLock by DoMobile | PIN / pattern / fingerprint | Yes | Photo & video vault | Free + IAP | Most features |
| AppLock Fingerprint (SpSoft) | Fingerprint / password | Yes | Hidden unlock | Free | Simplicity |
| Smart AppLock | PIN / pattern / fingerprint | Yes | Time & location rules | Free | Power users |
| Keepsafe | PIN / fingerprint | Yes | Encrypted media vault | Free + Premium | Photo & video privacy |
| Amarok | Shizuku-based hiding | — | Hides apps & files | Free (open-source) | Privacy-conscious |
| Smart Launcher 6 | PIN / biometric | — | Hide from drawer | Free + paid | Launcher + locking |
| Calculator Vault (HideU) | PIN (calculator disguise) | Varies | Disguised vault | Free + IAP | Hiding in plain sight |
Features and pricing change often — confirm current details on each app’s store listing. When in doubt, a built-in option is the safest.
A Word on Safety and Permissions
App lockers need powerful permissions — usually Accessibility and "draw over other apps" — to function. That makes choosing a trustworthy app essential. Stick to well-reviewed apps from established developers on the Google Play Store, check what data the app collects, and be cautious of lockers stuffed with ads or asking for unrelated permissions. Whenever a built-in option like Private Space or Secure Folder is available, it's the safer choice because it's part of the operating system itself. App locking is just one layer of privacy; for broader protection on your phone, also consider reputable antivirus software and a VPN.
How to Choose the Right App Lock
Use your phone's built-in tools first — Private Space on Android 15+ or Secure Folder on Samsung are the most secure and cost nothing. If you need cross-device features or a private media vault, a reputable third-party app like AppLock by DoMobile or Keepsafe fills the gap. Whatever you choose, pair it with a strong screen lock, biometric authentication, and a password manager for real protection.
Frequently Asked Questions
What is the best app lock for Android?
For most people, Android's built-in tools are best: Private Space (Android 15+) or Samsung Secure Folder. If you need a third-party app, AppLock by DoMobile is the most established and feature-rich free option.
Does Android have a built-in app lock?
Yes. Newer Android versions include Private Space, Samsung phones have Secure Folder, and many other manufacturers (Xiaomi, OnePlus, Oppo) include an App Lock feature in their Settings under Privacy or Security.
Are app lock apps safe to use?
Reputable ones are, but they require sensitive permissions, so only install well-reviewed apps from established developers. Built-in options like Private Space and Secure Folder are the safest because they're part of the operating system and don't share your data with third parties.
Can I lock apps with a fingerprint?
Yes. Android's built-in tools and most third-party app lockers support fingerprint (biometric) unlocking, which is faster and more secure than a PIN or pattern.
Can someone bypass an app lock?
Determined users can sometimes get around third-party lockers (via the Recent apps screen, Settings, or by force-stopping the app), which is why OS-enforced options like Private Space and Secure Folder are harder to defeat. If you use a third-party app, pick one that also protects Settings and prevents uninstallation.
Do app lock apps drain battery or slow down your phone?
Lightweight lockers have minimal impact, but some run constant background services and ads that can affect battery and performance. Built-in tools are the most efficient. If you notice slowdown, switch to a lighter app or a native option.
Are free app locks safe, or should I pay?
Reputable free lockers are fine for everyday use, but free versions often include ads and may collect more data. Paying usually removes ads and adds features rather than buying stronger security. For the best privacy at no cost, use your phone's built-in tools or an open-source app like Amarok.
Final Thoughts
Locking individual apps is a simple, effective way to protect your privacy. Start with your phone's built-in features — Private Space or Secure Folder — and only reach for a third-party app like AppLock or Keepsafe if you need extra features. Combined with a strong screen lock, app locking keeps your most sensitive apps for your eyes only.