BabelApp PDF viewer
v1.4 · 14.7 MB · code 90010400
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File information
UpdatedSep 10, 2025
PublishedMay 15, 2022
Packagecz.oksystem.viewer.pdf
Versionv1.4 (90010400)
Size14.7 MB
MD51f44057828444abf088a160f09dd5b84
Min SDK23
ABIsx86-64
Malware scanTRUSTED
Signature SHA119:14:A4:B0:FE:22:F3:FE:9F:C8:C2:78:A9:0D:93:0E:9A:11:6F:65
SignerO=OKsystem s.r.o., L=Prague, C=CZ
Total downloads500
This version500
DeveloperOKsystem
Age ratingEveryone
What's new in v1.4
Updates to support Android 15
Security scan
TRUSTED
- Developer signature verified 2025-09-10
- Signature SHA1 19:14:A4:B0:FE:22:F3:FE:9F:C8:C2:78:A9:0D:93:0E:9A:11:6F:65
- File MD5 1f44057828444abf088a160f09dd5b84
How to install BabelApp PDF viewer v1.4 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 14.7 MB of free storage.
- Grab cz.oksystem.viewer.pdf_90010400.apk — hit the Download button above (14.7 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 1f44057828444abf…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find cz.oksystem.viewer.pdf_90010400.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=OKsystem s.r.o., L=Prague, C=CZ. 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 BabelApp PDF viewer — tap Open on the install screen, or find the BabelApp PDF viewer icon in your app drawer (this build targets x86-64 devices).
Common install errors for BabelApp PDF viewer
- "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 6.0 Marshmallow 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.