FBReader: Favorite Book Reader
v3.1.9 · 7.5 MB · code 3010900
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File information
UpdatedJul 28, 2025
PublishedAug 13, 2020
Packageorg.geometerplus.zlibrary.ui.android
Versionv3.1.9 (3010900)
Size7.5 MB
MD5a17d2f69eaa98fe73918318f3a9957bc
Min SDK19
ABIsx86
Malware scanTRUSTED
Signature SHA12A:2B:47:B1:F3:A7:8B:BC:FF:11:90:9D:70:81:CB:E6:5B:68:7E:EE
SignerCN=Nikolay Pultsin, OU=Unknown, O=Geometer Plus, L=St. Petersburg, ST=Unknown, C=RU
Total downloads10,000,000
This version10,000,000
DeveloperFBReader.ORG Limited
Age ratingEveryone
What's new in v3.1.9
* On Android 13 the app requests the notifications permission
Security scan
TRUSTED
- Developer signature verified 2025-07-28
- Signature SHA1 2A:2B:47:B1:F3:A7:8B:BC:FF:11:90:9D:70:81:CB:E6:5B:68:7E:EE
- File MD5 a17d2f69eaa98fe73918318f3a9957bc
How to install FBReader: Favorite Book Reader v3.1.9 on Android 4.4 KitKat+
Takes about 2 minutes. You'll need roughly 7.5 MB of free storage.
- Grab org.geometerplus.zlibrary.ui.android_3010900.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 a17d2f69eaa98fe7…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find org.geometerplus.zlibrary.ui.android_3010900.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=Nikolay Pultsin, OU=Unknown, O=Geometer Plus, L=St. Petersburg, ST=Unknown, C=RU. 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 FBReader: Favorite Book Reader — tap Open on the install screen, or find the FBReader: Favorite Book Reader icon in your app drawer (this build targets x86 devices).
Common install errors for FBReader: Favorite Book Reader
- "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 4.4 KitKat 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.