Install KOReader on Kindle 4

KOReader is an eBook application optimized for E-Ink readers. It can even be installed on old Kindle devices. The manual explains to required steps.

Installation Instructions

Almost all required files can be downloaded from a thread on mobileread.com (Archive). The updated device certificates can be downloaded from another post on mobileread.com (Archive). KOReader can be downloaded from Github.

The procedure is as follows:

• Jailbreak Kindle
• Install developer certificates to allow custom applications (such as KUAL)
• Install KUAL launcher
• Install KOReader

Jailbreak Kindle

• Download kindle-k4-jailbreak-1.8.N-r18977.tar.xz and extract it
• Follow README
  • Copy data.tar.gz, ENABLE_DIAGS, diagnostic_logs to the root of Kindle and eject it from PC
  • Restart (Menu -> Settings -> Menu -> Restart)
  • After restart, select D) Exit, Reboot or Disable Diags
  • Select R) Reboot System" and "Q) To continue

Add Developer Certificates

• Download kindle-mkk-20141129-r18833.tar.xz and extract it
• Place file Update_mkk-20141129-k4-ALL_install.bin in root of Kindle and eject it from PC
• Install via Menu -> Settings -> Menu -> Update Your Kindle

Add Updated Developer Certificates

• Download DevCerts-20250419-KeyStore.zip and extract it
• Place file Update_mkk-20250419-k4-ALL_keystore-install.bin in root of Kindle and eject it from PC
• Install via Menu -> Settings -> Menu -> Update Your Kindle

Add KUAL

• Download KUAL-v2.7.37-gfcb45b5-20250419.tar.xz and extract it
• Place file KUAL-KDK-1.0.azw2 in documents folder of Kindle

Add KOReader

• Download koreader-kindle-v2025.10.zip and extract it
• Place folders into root of Kindle and eject it from PC

Usage

• Launch KUAL (should be part of the usual books menu)
• Launch KOReader (e.g., without framework to save resources)

Further Hints on Usage of KOReader

• Integration of reading state in Booklore in manual (Archive)
• Integration of database from Booklore in manual (Archive)