That’s fair. Fwiw that’s the main reason I tried to avoid kindle, so I would be able to take my library where i want and not be tied to Amazon

I’m pretty sure it’s a $30 dollar charge, from when I last looked into it. For that exact price difference you can get a Kobo, which isn’t Amazon and doesn’t have ads

I would assume since it was a block of raw text in Ukrainian in a translation file, it would have passed more under the radar than something like a backdoor. I do not know how things are reviewed before being pushed to release though.

I’m curious what features that Calibre was missing for reading that you are looking for specifically? I know that it’s got some pretty standard features built in, though I’ve never used it to read, only to check files before sending to eReader.

From what I recall it has to do with encoding and how the data stored references the following frame but not previous. Still seems like some engineering could be done to solve, so it it’s not as simple as “current Frame–”