Spritz is the trade-name for a specific RSVP app. RSVP, in the title of the post, is an acronym for Rapid Serial Visual Presentation.
Spritz, and similar tools, are reading tools that have been around for over a decade and brought up in the Calibre forum a few times previously, with a definite "No," in 2021 from Calibre development.
These two are the two I can find on a quick search that shows a bit of the difficulty in getting this working again.
https://www.mobileread.com/forums/sh...d.php?t=342645
https://www.mobileread.com/forums/sh...18#post2961018
(#639/640)
That is why I'm hopeful to find this third party plugin to reinstall. Because Spritz, like Bandaid, is only a tradename and under a trademark last I checked, finding "spritz-like" plugins under RSVP is difficult. Search engines also tend to focus on Browser plugins, not my specific Calibre plugin need.
If it is already in Calibre under a different name, that would help and explain why I can't find the third-party plugin anywhere else.