Personally, I switched back to Calibre Companion for my Android phone. Calibre Sync doesn't fit the 'treat it like a device' paradigm I'm used to and I don't want to put my library on a cloud service.
And the Calibre Sync developer doesn't appear be very responsive anymore, but google store does show the app was updated a week ago May 14, 2023.
FanFicFare has options for setting custom columns in your library. For a basic boolean 'Read' custom column, the
custom_columns_settings is likely best. Something like:
Code:
custom_columns_settings:
"False"->#my_read_column
Please ask in the
FFF thread if you want more FFF help.