Papyrix is described as 'A lightweight, user-friendly firmware for the Xteink X4 and Xteink X3 e-paper display readers. Built using PlatformIO and targeting the ESP32-C3 microcontroller. A single firmware auto-detects the panel variant at boot via I²C signature scan (BQ27220 fuel gauge, DS3231 RTC' and is a Ebook Reader in the news & books category. There are four alternatives to Papyrix for a variety of platforms, including Xteink, Linux, Android, Android Tablet and AppImageHub apps. The best Papyrix alternative is KOReader, which is both free and Open Source. Other great apps like Papyrix are Inx, TernOS and CrossPoint Reader.
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.
Inx is a community firmware for the Xteink X4. It is focused on a cleaner reading experience, better EPUB support, native image rendering, and practical device tools.
CrossPoint is open-source e-reader firmware - community-built, fully hackable, free forever. It's maintained by a growing community of developers and readers who believe your device should do what you want - not what a manufacturer decided for you.
United Kingdom