There has been huge progress with the converters for this device recently.
Xteink shared the format specs with me, and I put it here:
https://gist.github.com/CrazyCoder/b...58249f59f1327d.
Since then people created companion apps and online converters (even one based on crengine compiled into WASM):
https://x4converter.rho.sh/.
There are also several custom firmwares already available and a more performant display driver for 4-color rendering.
I almost finished my offline converter based on Cool Reader, will be released soon. See this post for some screenshots:
https://www.reddit.com/r/xteinkeread...mment/nsgztpx/.
And there is a Discord server for developers and users:
https://discord.gg/2cdKUbWRE8.