Smart AppLock: Privacy Protect v4.2.6
APK · 9 MB · version code 166 · Android 4.4+ · uploaded Jul 25, 2026
- Signature matches the Google Play version Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v4.3.7, uploaded Jun 19, 2026.
- Size: this file is 9 MB; the latest is 21.2 MB (12.2 MB larger).
- Android: this version needs Android 4.4+; the latest needs Android 5.0+. Use this one if your device runs an older Android release.
- The latest version asks for 10 more permissions: Authenticate accounts, Access all files, Show notifications, See all installed apps, Request delete packages, Request ignore battery optimizations, Schedule exact alarms, Apphub bind apphub service (custom)….
- The latest version no longer asks for: Approximate location, Run at startup, In-app purchases (Google Play Billing), Read Google service settings.
File information
- Version
- v4.2.6 (166)
- Uploaded
- Jul 25, 2026
- Size
- 9 MB
- Requires
- Android 4.4+ (API 19)
- CPU support
- x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
- Screen
- Small screens and larger
- MD5
- 1cfb6d3b14ca262abaac349bf50c129b
- Signing certificate (SHA-1)
- 58:93:2F:5B:E7:05:E7:0D:46:08:F8:AB:A6:A8:82:61:E3:B6:4F:2C
- Signed by
- CN=ThinkYeah, OU=www.thinkyeah.com, O=www.thinkyeah.com, L=Nanjing, ST=Jiangsu, C=CN
- File name
- com-thinkyeah-smartlockfree-166-75804009-1cfb6d3b14ca262abaac349bf50c129b.apk
- Package
- com.thinkyeah.smartlockfree
- Downloads (all versions)
- 10M+
- Age rating
- PEGI 3 · Everyone
Permissions (34)
This version requests 34 permissions, 8 of them sensitive.
- Approximate location Sensitive android.permission.ACCESS_COARSE_LOCATION
- 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
- Write settings Sensitive android.permission.WRITE_SETTINGS
- Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
- 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
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- 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
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
- Read network usage history android.permission.READ_NETWORK_USAGE_HISTORY
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Restart packages android.permission.RESTART_PACKAGES
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- Run foreground services android.permission.FOREGROUND_SERVICE
- Use fingerprint hardware android.permission.USE_FINGERPRINT
- View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jul 25, 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
- Developer signature not checked yet Jul 25, 2026
- Validated against Google Play Jul 25, 2026
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans 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.
How to install Smart AppLock: Privacy Protect on Android 4.4+
You'll need about 18 MB of free space.
- Download the APK — tap Download APK above (9 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-thinkyeah-smartlockfree-166-75804009-1cfb6d3b14ca262abaac349bf50c129b.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 1cfb6d3b14ca262abaac349bf50c129b. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Smart AppLock: Privacy Protect — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 4.4+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.