Smart AppLock: Privacy Protect

Lock apps with password!

ThinkYeah · com.thinkyeah.smartlockfree

4.5 out of 5 (31 ratings) 10M+ downloads v4.3.7 21.2 MB Android 5.0+ PEGI 3 · Everyone

Download APK 21.2 MB All versions

Signature matches the Google Play version Details

Smart AppLock: Privacy Protect screenshot 1

Smart AppLock: Privacy Protect screenshot 2

Smart AppLock: Privacy Protect screenshot 3

Smart AppLock: Privacy Protect screenshot 4

Smart AppLock: Privacy Protect screenshot 5

Smart AppLock: Privacy Protect screenshot 6

Smart AppLock: Privacy Protect screenshot 7

Smart AppLock: Privacy Protect screenshot 8

At a glance

Latest version: v4.3.7 (174)
Updated: Jun 19, 2026 (4 months ago)
APK size: 21.2 MB
Requires: Android 5.0+ (API 21)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Tools (app)
Listed since: Jul 26, 2020 (at least)
Permissions: 40 (9 sensitive)
Website: ThinkYeah.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Smart AppLock: Privacy Protect is an app by ThinkYeah in the Tools category, listed since at least July 2020. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 4.2.6, the APK grew from 9 MB to 21.2 MB and the minimum Android version rose from 4.4 to 5.0. It asks for 40 permissions, 9 of them sensitive, including camera, read phone status and identity and access all files. Compared with version 4.2.6, it adds 8 new permissions (“Access all files”, “See all installed apps”, “Advertising ID” and 5 more) and drops 4 (“Approximate location”, “Run at startup”, “In-app purchases” and “Read Google service settings”). The app can read the advertising ID that ad and analytics services use.

Ratings

4.5out of 531 ratings

5 ★68%
4 ★10%
3 ★23%
2 ★0%
1 ★0%

Ratings from users of the source store — not collected or verified by AAPKs.

What's new in v4.3.7

1. Enable "Do not Disturb" by default to avoid locking every time when open an app. 2. Improve the stability.

Description

From the listing uploaded by “appupdater”.

★ The elegant, light and professional App Lock - Smart AppLock ★ -- Unlock with Fingerprint (Samsung or Android 6.0 devices) -- Smart AppLock is a tool to lock apps you like, protect you from privacy leak! It is your great privacy guard and app lock! With AppLock, you are able to ☆ Lock privacy - lock apps containing privacy content, such as photos, videos(Gallery), short messages(SMS or MMS) and call logs ☆ Lock apps - lock SNS apps, such as Facebook, Whatsapp, Twitter ☆ Lock Incoming Calls ☆ Lock settings - lock system settings, install/uninstall apps to keep phone away from being messed up by others or kids ☆ Lock markets - lock games and markets to prevent your kids from addicting in games or purchasing in markets without your knowing Special Features of AppLock: • Disguise your lock screen to prevent from breaking into your password • Protect apps with multiple lock types, such as Pattern Lock, PIN lock • With AppLock home screen widget, one click to toggle lock status • Custom lock screen style, custom lock screen background • Light, less memory usage • Advice you to lock related apps smartly, privacy has never been so safe • Beautiful UI and easy to use • No delay auto start after device reboots • Lock recent history, prevent app screenshot being leaked • Hide and encrypt pictures and videos with GalleryVault • Launch locked app within AppLock without password • Break-in Alerts: Take a photo when someone tries to enter your locked app with an invalid password • DelayLock: Once unlock any app, no password is required within a delay time • Unlock with Fingerprint. ----------- FAQ --------- ► I forgot my password, how to retrieve it? When you setup the password/pattern the first time, AppLock will ask you to setup a Password Retrieve method: "Security Question". To retrieve password, tap the "Forgot?" button to show Retrieve Password panel. Security Question Input the answer to the question you setup before. ► Dose Smart AppLock support iOS platform? Yes, we have an iOS version "iAppLock" for iOS users, you can visit http://iapplock.thinkyeah.com to get the download or search "iapplock" in Cydia to install.(requires Jailbreaked iOS) ---- Any issue or suggest for AppLock, welcome to send mail to us! [email protected] We focus on Privacy Protect, provide the professional AppLock to protect your privacy! website: http://www.thinkyeah.com Google+ : https://plus.google.com/105614151477767438997 Facebook: http://www.facebook.com/smartapplock Twitter: https://twitter.com/thinkyeahapp Supported languages: English, Russian, Spanish, Turkish, German, Portuguese, French, Japanese, Korean, Polish, Simplified Chinese, Traditional Chinese.

Version history

2 versions are listed, going back to v4.2.6. Since v4.3.7 it requires Android 5.0+.

v4.3.7 LATEST Jun 19, 2026 21.2 MB TRUSTED v4.2.6 Jul 25, 2026 9 MB TRUSTED

All 2 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jun 19, 2026.
Certificate issued to “www.thinkyeah.com” This is the certificate of the Google Play version.
Same certificate as the other version checked

Store checks and file details

Developer signature not checked yet Jun 19, 2026
Validated against Google Play Jun 19, 2026
Signed byCN=ThinkYeah, OU=www.thinkyeah.com, O=www.thinkyeah.com, L=Nanjing, ST=Jiangsu, C=CN
Signing certificate (SHA-1)58:93:2F:5B:E7:05:E7:0D:46:08:F8:AB:A6:A8:82:61:E3:B6:4F:2C
File MD543223c3194311a10be659aff2d6095af
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (40)

Smart AppLock: Privacy Protect requests 40 permissions, 9 of them sensitive.

Access all files Sensitive android.permission.MANAGE_EXTERNAL_STORAGE
Camera Sensitive android.permission.CAMERA
Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
Package usage stats Sensitive android.permission.PACKAGE_USAGE_STATS
Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
See all installed apps Sensitive android.permission.QUERY_ALL_PACKAGES
Write settings Sensitive android.permission.WRITE_SETTINGS
Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
Advertising ID com.google.android.gms.permission.AD_ID
Apphub bind apphub service (custom) com.applovin.array.apphub.permission.BIND_APPHUB_SERVICE
Authenticate accounts android.permission.AUTHENTICATE_ACCOUNTS
Change wifi state android.permission.CHANGE_WIFI_STATE
Clear app cache android.permission.CLEAR_APP_CACHE
Context write use app feature survey (custom) com.samsung.android.providers.context.permission.WRITE_USE_APP_FEATURE_SURVEY
Control vibration android.permission.VIBRATE
Delete cache files android.permission.DELETE_CACHE_FILES
Expand status bar android.permission.EXPAND_STATUS_BAR
Flashlight android.permission.FLASHLIGHT
Full network access android.permission.INTERNET
Get package size android.permission.GET_PACKAGE_SIZE
Get tasks android.permission.GET_TASKS
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
Kill background processes android.permission.KILL_BACKGROUND_PROCESSES
Launcher read settings (custom) com.android.launcher.permission.READ_SETTINGS
Mount unmount filesystems android.permission.MOUNT_UNMOUNT_FILESYSTEMS
Oppo oppo component safe (custom) oppo.permission.OPPO_COMPONENT_SAFE
Prevent the device from sleeping android.permission.WAKE_LOCK
Read network usage history android.permission.READ_NETWORK_USAGE_HISTORY
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Request delete packages android.permission.REQUEST_DELETE_PACKAGES
Request ignore battery optimizations android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
Restart packages android.permission.RESTART_PACKAGES
Run foreground services android.permission.FOREGROUND_SERVICE
Schedule exact alarms android.permission.SCHEDULE_EXACT_ALARM
Show notifications android.permission.POST_NOTIFICATIONS
Use fingerprint hardware android.permission.USE_FINGERPRINT
View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait
Wi-Fi android.hardware.wifi

Smart AppLock: Privacy Protect APK: questions and answers

Is there a version of Smart AppLock: Privacy Protect for older Android phones?

The current version needs Android 5.0 or later. Version 4.2.6 is the newest listed build that installs on Android 4.4 and later. Get version 4.2.6 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Smart AppLock: Privacy Protect APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 43223c3194311a10be659aff2d6095af.