Universal Book Reader Full Key
v1.1 · 259.2 KB · code 2
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File information
UpdatedMar 23, 2020
PublishedAug 3, 2014
Packagecom.mobisystems.ubreader.key
Versionv1.1 (2)
Size259.2 KB
MD5fc9d21859deba9dac5d05eadd98b15cb
Min SDK9
Malware scanTRUSTED
Signature SHA139:24:E1:05:9F:20:B3:1D:87:2E:5A:54:59:5B:C8:C6:11:A3:E2:B8
SignerCN=Nikolay Kussovski, OU=Mobile Systems, O="Mobile Systems, Inc.", L=San Diego, ST=California, C=US
Total downloads31,570
This version31,570
DeveloperMobile Systems, Inc.
Age ratingEveryone
What's new in v1.1
Version 3.0.458
* Optimized for 4.4 OS version
* SD card bug fixed
Version 3.0.411
* UB Store removed from the application.
* Log in no longer required for UB Reader.
* Ability to locally protect a book with a password.
* Ability to edit a book’s name, author and cover in the Book info dialog.
* Ability to use vibration on text selection in ePub books.
* Import of the default books.
* Optimized for 4.4 OS version
* SD card bug fixed
Version 3.0.411
* UB Store removed from the application.
* Log in no longer required for UB Reader.
* Ability to locally protect a book with a password.
* Ability to edit a book’s name, author and cover in the Book info dialog.
* Ability to use vibration on text selection in ePub books.
* Import of the default books.
Security scan
TRUSTED
- Developer signature verified 2025-03-10
- Scanned for malware 2020-08-23 01:32:02
- Signature SHA1 39:24:E1:05:9F:20:B3:1D:87:2E:5A:54:59:5B:C8:C6:11:A3:E2:B8
- File MD5 fc9d21859deba9dac5d05eadd98b15cb
How to install Universal Book Reader Full Key v1.1 on Android API 9+
Takes about 2 minutes. You'll need roughly 259.2 KB of free storage.
- Grab com.mobisystems.ubreader.key_2.apk — hit the Download button above (259.2 KB). 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 fc9d21859deba9da…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.mobisystems.ubreader.key_2.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 Kussovski, OU=Mobile Systems, O="Mobile Systems, Inc.", L=San Diego, ST=California, 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 Universal Book Reader Full Key — tap Open on the install screen, or find the Universal Book Reader Full Key icon in your app drawer.
Common install errors for Universal Book Reader Full Key
- "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 9 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.