Best App Lock Apps for Android (2026)
Handing your phone to a friend should not mean handing over your chats, photos, and banking app too. A good app lock puts a PIN, pattern, or fingerprint in front of anything you want kept private, and the better ones add hidden vaults and intruder alerts on top. We installed and lived with the most popular options for a few weeks, locking real apps and trying to break back into them, to see which ones hold up in everyday use. For more ways to lock down your phone, browse our full Security & Privacy picks.
1. AppLock by DoMobile
This is the one most people picture when they think app lock, and it has earned that spot. We locked our gallery, WhatsApp, and settings in under a minute, then leaned on the fingerprint unlock all week. The photo and video vault genuinely hides files from the main gallery, and the fake cover that disguises the lock screen as a crash error actually fools curious hands.
2. Norton App Lock
Free, ad-free, and backed by a name we trust, Norton App Lock kept things refreshingly simple in our testing. You pick a PIN or pattern, choose which apps to guard, and that is basically it. There is no vault or extra clutter, which we actually liked for a phone we just wanted locked down fast. The sneak-peek feature snaps a photo of anyone who fumbles the code three times.
3. AVG AntiVirus (App Lock)
If you already run security software, the App Lock built into AVG saves you a second install. We protected our messaging and photo apps from the same dashboard that handles scanning, and unlocking with a fingerprint felt instant. It is worth comparing against our wider antivirus picks, since having the malware shield and the lock living together kept our home screen tidier.
4. Smart AppLock
Smart AppLock leans into the playful side of privacy. Beyond the usual PIN and pattern, it offers a fake fingerprint scanner and a time-based lock that only guards certain apps during set hours, which we used to keep social media off-limits during work. Setup took a little patience, but once configured it ran quietly in the background without nagging us for permissions every day.
5. Keepsafe Photo Vault
When the thing you really want hidden is photos, Keepsafe is the specialist we kept coming back to. It moves images into a PIN-protected, encrypted vault that disappears from your regular gallery entirely. We loved the Fake PIN option that opens a decoy album if someone forces you to unlock it. For locking whole apps you will want a companion tool, but for private pictures it is hard to beat.
6. AppLocker (BGNmobi)
This lightweight locker surprised us with how little it weighed on the phone. It guards apps with a pattern or PIN, hides notification content on the lock screen, and lets you set unlock by location, so apps stay open at home and lock once you leave. Pair it with one of our VPN picks and your traffic stays private too. Battery drain was barely noticeable across our test week.
7. Vault (NQ Mobile)
Vault rolls a lot into one app: private photos, hidden videos, locked messages, and even a separate space for a second set of social accounts. We found the call and SMS hiding genuinely useful for keeping certain conversations off the main log. The interface shows its age in a few corners, but everything we hid stayed hidden, and the cloud backup meant our vault survived a phone reset.
8. LOCKit
LOCKit packs app locking, a photo and video vault, and intruder selfies into a free package that never felt slow on our mid-range test phone. The standout was how granular it gets: you can lock individual settings toggles like Wi-Fi and Bluetooth so nobody flips them while holding your phone. It does push a few extra features you can ignore, but the core lock is solid and quick.
9. Perfect AppLock
For tinkerers, Perfect AppLock offers the deepest bag of tricks we tried. Cover-screen disguises, a separate lock for your photo gallery, and orientation locking are all here, plus a multi-lock mode that mixes PIN and pattern across different apps. It asks for a fair number of permissions up front, so read the prompts, but if you want fine control over exactly how each app is guarded, it delivers.
Frequently asked questions
Are app lock apps actually safe to use?
Reputable ones are, but the app gets deep access to your phone, so it pays to stick with trusted names. We favor lockers from established security brands or developers with long track records and lots of reviews. Check what permissions an app requests and skip anything that wants far more than it needs to do the job.
Why not just use the built-in screen lock on Android?
Your screen lock protects the whole phone at startup, but it does nothing once the device is unlocked and in someone's hands. An app lock adds a second gate in front of specific apps, so you can let a friend borrow your phone for a game while your messages, photos, and banking app stay sealed.
Will an app lock drain my battery?
A well-built locker sips very little power, since it mostly sits idle and only wakes when you open a guarded app. In our testing the lightweight options had no noticeable effect over a full day. If you do see heavy drain, it usually points to a poorly optimized app, and switching to a leaner one fixes it.
What happens if I forget my app lock PIN?
Most apps let you set a recovery email or a security question during setup, so do that before you need it. With that in place you can reset the PIN even if you blank on it. If you skip recovery setup, your only fallback is usually reinstalling the locker, which can mean losing anything stored in its vault.