App Lock
v1.4.2 · 4.5 MB · code 16
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File information
UpdatedSep 18, 2025
PublishedDec 20, 2019
Packagenu.app.lock
Versionv1.4.2 (16)
Size4.5 MB
MD506e63a28cd6dd9ef7339ac6a7d35abb9
Min SDK16
Malware scanTRUSTED
Signature SHA1DF:9B:C0:4F:7E:D6:CB:23:E9:CB:3B:39:15:6D:76:1D:B2:6B:27:F5
SignerC=TH
Total downloads100,000
This version100,000
DeveloperNu-Kob
Age ratingEveryone
What's new in v1.4.2
- Add option to make pattern invisible while drawing pattern.
- Fix bug : cannot disable fingerprint.
- Performance and stability improvements.
- Fix bug : cannot disable fingerprint.
- Performance and stability improvements.
Security scan
TRUSTED
- Developer signature verified 2021-10-23
- Scanned for malware 2021-10-23 09:38:32
- Signature SHA1 DF:9B:C0:4F:7E:D6:CB:23:E9:CB:3B:39:15:6D:76:1D:B2:6B:27:F5
- File MD5 06e63a28cd6dd9ef7339ac6a7d35abb9
How to install App Lock v1.4.2 on Android API 16+
Takes about 2 minutes. You'll need roughly 4.5 MB of free storage.
- Grab nu.app.lock_16.apk — hit the Download button above (4.5 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 06e63a28cd6dd9ef…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find nu.app.lock_16.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read C=TH. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open App Lock — tap Open on the install screen, or find the App Lock icon in your app drawer.
Common install errors for App Lock
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android API 16 or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.