App Lock

App Lock icon

App Lock

Nu-Kob

3.8

800 ratings

100,000+

downloads

Free

In this app lock, users can secure applications with passwords, patterns, or fingerprint recognition. Includes options for resetting passwords and preventing uninstallation.

AppRecs review analysis

AppRecs rating 3.7. Trustworthiness 61 out of 100. Review manipulation risk 43 out of 100. Based on a review sample analyzed.

★★★☆☆

3.7

AppRecs Rating

Ratings breakdown

5 star

56%

4 star

13%

3 star

6%

2 star

6%

1 star

19%

What to know

Ad complaints

Many low ratings mention excessive ads

Questionable review patterns

43% review manipulation risk - some review patterns appear unusual

Review quality concerns

75% of sampled 5-star reviews are very short

About App Lock

Use App Lock to prevent others from checking your device's photos, videos, messages, facebook, whatsapp, instagram, mail and contacts without you knowing!

"App Lock" has an ability to lock any application on your phone. It will ask your PIN or Pattern before open an application.

Features:
- Lock apps with password, pattern, or fingerprint lock to protect your privacy.
- Supports convenient and powerful lock with fingerprint sensor.
(This will use the same fingerprint registered in the Android Settings.)
- PIN can be at least 4 digits.
- Pattern size can be 3x3, 4x4, 5x5 and 6x6.
- Supports the ability to reset a lost password/ Forgotten password.
(By asking your security question to reset password)
- Allow a brief exit: no need password, pattern, fingerprint again within set time.
(Unlock one time, Unlock for 1-5 minutes or Unlock until screen off).
- Lock "Recent App" button while showing lock screen to prevent seeing other application screen.
- Prevent uninstalling App Lock

How to use:
- Follow instructions in the application to enable Usage Access Permission
- Choose lock method (PIN or Pattern).
- Choose and answer your security question that will be used when you forgot PIN/Pattern.
- Enable which applications you want to lock.
Try to open your locked application, you will see the lock screen showing up.


--- FAQ ---
1. How to change password?
- Open App Lock >> Setting >> Change PIN/Pattern

2. How can I prevent App Lock to be uninstalled and delete?
- Open App Lock >> Setting >> Enable “Prevent Uninstalling Application”

3. How do I get my forgotten password?
- Tap “FORGOT PASSWORD/PATTERN” on lock screen
- Security Answer: enter security answer.
- Reset Password: enter new password/pattern

4. Can't uninstall App Lock.
- Open App Lock >> Setting >> Disable “Prevent Uninstalling Application” before uninstalling app

note : for Huawei users, please set permission manually. (Setting > Security > app with usage access)

Accessibility Service Usage:
App Lock requires accessibility service permission in order to enable core functionality. The application will not read the sensitive data and any content on your screen. In addition, the application will not collect and share the data from accessibility service with any third-party.
By enabling the service, the application will be able to recognize running application and show lock screen immediately.
If you disable the accessibility service, the main features cannot work properly.
App Lock Screenshots
Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6Screenshot 7Screenshot 8

Tap to Rate:

Reviews for App Lock

bsneha behera

1/26/2026

fantastic

Victoria Sohatra

10/7/2025

vicktoria

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