BookFusion eBook Reader & Manager (free app, but you need to create an account), with Calibre cloud & e-book device sync plugin, seems to be relatively actively developed (last update 13 October 2021).
Calibre Library (paid app), it seems like it only offers wireless downloading, allowing to wirelessly connect to your Calibre e-book library or other Stanza source, abandoned: last updated 23 April 2015.
Calibre Sync (paid app), sync via cloud services, including Google Drive, Dropbox, Microsoft OneDrive, seems to be actively developed (last update 29 January 2022).
Calibre Companion (paid app), does only sync (also wirelessly), occasionally recommended here, last updated 20 August 2020.
I've never used Calibre to actually read the books.īeside Calibre support in KOReader (and the associated Calibre plugin mentioned by u/theprawn), there are also a few Android apps: I use a separate eBook reader app on the device to do the reading. The UI is ugly but it makes getting into the server and downloading books to my Android devices super easy. Though in practice, I use this app - hl=en_US. I can get my books anywhere in the world b/c I've exposed the Content Server through my firewall, and all I need to get them is a web browser. As a web application dev, this makes more sense to me, instead of some weird protocol that only works on my local network. That said, I see the advantage over a "normal" installation setup of two Calibre instances on two separate machines, because it turns Calibre into a client/server web application for book distribution, rather than a peer-to-peer type system. I don't think it's possible, at least with the prepackaged Docker images from linuxserver. I assume you're talking about using the "wireless device connection" method.