[hmart]

I vow for open standards and used to upload epub files to Google Play Books and read in my devices (Kindle Fire 8 - with Google Play sideloaded, iPhone, iPad) with decent Sync. In december I got a Kobo Aura 2, my eyes are more comfortable have less distractions but I lost ubiquity and sync, also E-reader feels slugish and dictionary font is very small even with glasses. It's a take the blue/red pill situation.

[app4soft]

I'm so sad that WikiReader project, debuted in 2009, was abandoned in 2014.[0]

Hopefully, The Open Book looks more promising & would be able to fully replace WikiReader.

JFTR, Need write an article about The Open Book Project[1] on Wikipedia.[2]

[0] https://en.wikipedia.org/wiki/WikiReader

[1] https://github.com/joeycastillo/The-Open-Book

[2] https://en.wikipedia.org/wiki/Open_Book

[hmart]

Also had a Kindle some years ago and walked the Calibre road : Problems wity text flow, TOC, that are not Calibre problems but poorly formated books even from high end publishing houses.