CompTIA CertMaster
v4.9.3 · 7.5 MB · code 4903
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File information
UpdatedJul 26, 2017
PublishedApr 12, 2015
Packagecom.knowledgefactor.comptia
Versionv4.9.3 (4903)
Size7.5 MB
MD52ae815ce9dfc84e09648948ed007c3b6
Min SDK16
Malware scanTRUSTED
Signature SHA138:CE:F1:3C:8F:11:43:09:85:AB:2D:04:C8:B7:B6:46:5C:08:1A:E1
SignerCN=Knowledge Factor, OU=Knowledge Factor, O=Knowledge Factor, L=Boulder, ST=Colorado, C=us
Total downloads50,000
This version50,000
DeveloperCompTIA
Age ratingEveryone
What's new in v4.9.3
Fix for log in issues experienced by some users.
Security scan
TRUSTED
- Developer signature verified 2017-07-26
- Scanned for malware 2020-11-22 19:37:52
- Signature SHA1 38:CE:F1:3C:8F:11:43:09:85:AB:2D:04:C8:B7:B6:46:5C:08:1A:E1
- File MD5 2ae815ce9dfc84e09648948ed007c3b6
How to install CompTIA CertMaster v4.9.3 on Android API 16+
Takes about 2 minutes. You'll need roughly 7.5 MB of free storage.
- Grab com.knowledgefactor.comptia_4903.apk — hit the Download button above (7.5 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 2ae815ce9dfc84e0…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.knowledgefactor.comptia_4903.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=Knowledge Factor, OU=Knowledge Factor, O=Knowledge Factor, L=Boulder, ST=Colorado, C=us. 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 CompTIA CertMaster — tap Open on the install screen, or find the CompTIA CertMaster icon in your app drawer.
Common install errors for CompTIA CertMaster
- "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.