QB - Quality Assurance Control
v4.1.9 · 26.9 MB · code 411
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File information
UpdatedApr 13, 2026
PublishedApr 14, 2021
Packageorg.horizondvp.q4b.q4b
Versionv4.1.9 (411)
Size26.9 MB
MD5c4653c75a7cb9188984215a44786a2b8
Min SDK26
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA131:28:02:41:B0:40:27:C2:5D:2D:4C:65:3B:48:2D:A5:D5:3A:5A:0F
SignerCN=Moshe Abudi, OU=it_department, O=Moshe and Yair, L=Herzeliya, ST=Hasharon, C=972
Total downloads1,000
This version1,000
Developeryair avgay&moshe abudi
Age ratingEveryone
What's new in v4.1.9
Added the ability to export all information about signed materials to PDF
Security scan
TRUSTED
- Developer signature verified 2026-04-13
- Signature SHA1 31:28:02:41:B0:40:27:C2:5D:2D:4C:65:3B:48:2D:A5:D5:3A:5A:0F
- File MD5 c4653c75a7cb9188984215a44786a2b8
How to install QB - Quality Assurance Control v4.1.9 on Android 8.0 Oreo+
Takes about 2 minutes. You'll need roughly 26.9 MB of free storage.
- Grab org.horizondvp.q4b.q4b_411.apk — hit the Download button above (26.9 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 c4653c75a7cb9188…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find org.horizondvp.q4b.q4b_411.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 CN=Moshe Abudi, OU=it_department, O=Moshe and Yair, L=Herzeliya, ST=Hasharon, C=972. 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 QB - Quality Assurance Control — tap Open on the install screen, or find the QB - Quality Assurance Control icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for QB - Quality Assurance Control
- "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 8.0 Oreo 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.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.