Thank you for taking over the development.
I've always wanted to be able to synchronize my reading progress on KOReader from Calibre but it's never worked. I'll give it a try.
Edit:
It's working. Thank you. I now have a way to transfer my reading progress if my e-reader breaks down.
I have several improvement ideas:
1- Add the possibility to sync the KOReader history with Calibre.
2- Improve the synchronization interface. With my 1,295 books, it's impossible to scroll to find the one that was successfully synchronized. Perhaps it would be better to sort or filter this sync screen. Maybe with only the synchronized one at the top or even hide all the others with the option to open a json log file for more details.
3- Add the ability to sync tags in both directions to take advantage of KOReader's new collections feature.
4- Add a progress bar to sync. Calibre that freezes for several tens of seconds is not very reassuring.