Lock App - Smart App Locker

58.4K reviews
Content rating
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About this app

#1 app locker in 54 countries. Millions of satisfied users
Lightweight, ad free, approved by Google

Want to lock your Instagram, Snapchat, WhatsApp, Hangouts, WeChat, Facebook, Twitter, Gmail, Camera, Hide Gallery, Hide Photos, Hide Videos etc. Lock them easily on your phone. Completely Free, No Ads, and Small size

How it works ?
• Lock any app in the App Locker
• When the locked app is launched on your phone, your will be asked for a password
• Enter the set password to unlock the app

Other features

Only app in PlayStore with
No Ads
Completely Free
• Smallest Size
• No battery impact
• Regularly updated
Fingerprint unlock option
• Super secret mode - Hide icon of the app
Support for : Pin Lock, Pattern Lock, Password Lock and intuitive Crash Screen Lock

If you have any questions, feel free to contact us on the support email.
Updated on
Mar 27, 2017

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
No information available
58.4K reviews
A Google user
May 19, 2019
Tried several similar apps. All of them suffered from the same problem: when the locked app is started, it initially flashes for a brief moment, before the lock screen appears. With this one it happens sometimes, too. Otherwise this app works fine. Some other apps locked up the phone occasionally, sometimes didn't lock the app at all. This one is more reliable.
69 people found this review helpful
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Elizabeth Hock
February 2, 2021
Nice! 👍 This is the only one I've found that actually works, and I have tried a few. One thing I wish, but donknow if it's possible without a phone root access, Is it possible to give device administative access, so that I don't have to restart it everytime I restart my phone? 🔹 But this one really works! Sometimes it asks for my pin # twice, but that's fine with me. I feel much more secure having my browsers with saved passwords in bookmarked pages locked away. Thank you!👍
219 people found this review helpful
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Ray Americano
December 11, 2021
There are certain apps this doesn't work well with. For example when I try to unlock Facebook, no matter how many times i get the password correct, it displays FB for a millisecond, then I get asked for the password again and again and again and AGAIN! Works fine other than that, and I do Not have the issue of it not starting, when I reboot my phone, as others have mentioned in the low reviews. For those curious, I use this app on two phones... Moto Stylus 2021. Galaxy Note 9.
69 people found this review helpful
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Translated in 10 languages
Spanish (Americas)
Portuguese (Portugal)