Universal Book Reader v3.8.756
APK · 17.2 MB · version code 756 · Android 4.0+ · uploaded Apr 13, 2018
- Same certificate as v4.9.1605, which matches Google Play Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v4.9.1605, uploaded Jul 18, 2026 — about 8 years after this one.
- Size: this file is 17.2 MB; the latest is 19.2 MB (2.1 MB larger).
- Android: this version needs Android 4.0+; the latest needs Android 4.0.3+. Use this one if your device runs an older Android release.
- The latest version asks for 3 more permissions: Run foreground services, Google Play install referrer, Read Google service settings.
- The latest version no longer asks for: Push messaging (app-defined).
File information
- Version
- v3.8.756 (756)
- Uploaded
- Apr 13, 2018
- Size
- 17.2 MB
- Requires
- Android 4.0+ (API 14)
- CPU support
- ARM (legacy)
- Graphics
- OpenGL ES 2.0+
- Screen
- Small screens and larger
- MD5
- 26a7191d9dd571bc330632bab843ece4
- Signing certificate (SHA-1)
- 39:24:E1:05:9F:20:B3:1D:87:2E:5A:54:59:5B:C8:C6:11:A3:E2:B8
- Signed by
- CN=Nikolay Kussovski, OU=Mobile Systems, O="Mobile Systems, Inc.", L=San Diego, ST=California, C=US
- File name
- com-mobisystems-ubreader-west-756-36601754-26a7191d9dd571bc330632bab843ece4.apk
- Package
- com.mobisystems.ubreader_west
- Downloads (all versions)
- 10M+
- Age rating
- PEGI 16 · Medium Maturity
What's new in v3.8.756
· Introduced a fresh new look
· Simplified application navigation
· New long-press multi-select mode for book management
Permissions (12)
This version requests 12 permissions, 1 of them sensitive.
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
- Alarm set alarm (custom) com.android.alarm.permission.SET_ALARM
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Push messaging (app-defined) com.mobisystems.ubreader_west.permission.C2D_MESSAGE
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “Mobile Systems, Inc.” This is the certificate of the Google Play version.
- Same certificate as v4.9.1605, which matches Google Play v4.9.1605
Store checks
- Developer signature not verified Nov 11, 2021
- Antivirus scan passed Nov 3, 2020
- Uploaded by “michael-belisle” Bronze tier · 3,548 followers · uploading since 2013
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself.
How to install Universal Book Reader on Android 4.0+
You'll need about 34.3 MB of free space.
- Download the APK — tap Download APK above (17.2 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-mobisystems-ubreader-west-756-36601754-26a7191d9dd571bc330632bab843ece4.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 26a7191d9dd571bc330632bab843ece4. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Universal Book Reader — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 4.0+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for ARM (legacy) only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.