I’ve used Celtx scriptwriting and production software for several years now and put over 20 short films through it.
Celtx is excellent and I have collaborated with crews working across the world.
However when it comes to scheduling it’s a disaster.
You have to be able to schedule so that you can balance actors, locations crew, equipment props etc. but there is no way of doing this in Celtx.
So I have had to to a very awkward work around which is to roughly schedule, then produce a one line schedule report copy and then paste in to Excel. Unfortunately the one line schedule is in 2 line format, so that is very difficult to extract into a one line excel spreadsheet.
Then having matched up the locations, actors etc to give us the most efficient shooting schedule I then have to copy it back into Celtx.