OPAPP
v4.2.2 · 7.8 MB · code 122
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File information
UpdatedApr 23, 2026
PublishedAug 15, 2019
Packagegr.opap
Versionv4.2.2 (122)
Size7.8 MB
MD5bada5adc18e89bf055ed3c790824f28a
Min SDK21
Malware scanTRUSTED
Signature SHA18D:BB:B8:CE:74:B8:ED:FE:70:0F:ED:A3:06:20:D8:23:4D:F1:13:ED
SignerCN=OPAP
Total downloads17,830
This version17,830
DeveloperKonstantinos
Age ratingLow Maturity
What's new in v4.2.2
New LOTTO
General Fixes and functionality improvements
General Fixes and functionality improvements
Security scan
TRUSTED
- Developer signature verified 2023-10-07
- Signature SHA1 8D:BB:B8:CE:74:B8:ED:FE:70:0F:ED:A3:06:20:D8:23:4D:F1:13:ED
- File MD5 bada5adc18e89bf055ed3c790824f28a
How to install OPAPP v4.2.2 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 7.8 MB of free storage.
- Grab gr.opap_122.apk — hit the Download button above (7.8 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 bada5adc18e89bf0…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find gr.opap_122.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=OPAP. 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 OPAPP — tap Open on the install screen, or find the OPAPP icon in your app drawer.
Common install errors for OPAPP
- "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.