mCOBISS
v4.3.1 · 15.2 MB · code 70
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File information
UpdatedJan 6, 2026
PublishedJan 21, 2021
Packagesi.izum.mcobiss
Versionv4.3.1 (70)
Size15.2 MB
MD5dbd96929e45a0350d7208cb6dec55feb
Min SDK21
ABIsarmeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA17C:36:CC:EF:82:83:0F:1A:CB:BB:00:F6:AB:4D:46:B9:3B:43:6F:30
SignerO=izum
Total downloads100,000
This version100,000
DeveloperIZUM - Institut informacijskih znanosti
Age ratingEveryone
What's new in v4.3.1
changed barcode display on the membership card
minor bug fixes
minor bug fixes
Security scan
TRUSTED
- Developer signature verified 2026-01-06
- Signature SHA1 7C:36:CC:EF:82:83:0F:1A:CB:BB:00:F6:AB:4D:46:B9:3B:43:6F:30
- File MD5 dbd96929e45a0350d7208cb6dec55feb
How to install mCOBISS v4.3.1 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 15.2 MB of free storage.
- Grab si.izum.mcobiss_70.apk — hit the Download button above (15.2 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 dbd96929e45a0350…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find si.izum.mcobiss_70.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 O=izum. 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 mCOBISS — tap Open on the install screen, or find the mCOBISS icon in your app drawer (this build targets armeabi-v7a/arm64-v8a devices).
Common install errors for mCOBISS
- "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 5.0 Lollipop 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 armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.