Do you have any links to those other applications it would be good to compare and contrast?
Looking at the Krakow University’s site there appears to be to files:
http://www.as.up.krakow.pl/ephem/allstars-cat.txt
and
http://www.as.up.krakow.pl/ephem/EPHEM.TXT
They both look like they contain the same data. The EPHEM.TXT looks easier to read. There isn’t a field for the percentage of the period the eclipse takes part for. It might be nice merge this with the GCVS, but that does raise questions of how to show where data originated from.