A free browser tool for theatre directors and stage managers. Compare the cast lists for two scenes, add today's absences and see whether the scenes can rehearse in parallel. No account required. Cast entries stay in the browser and are not stored. Aggregate usage counters contain no cast data. The free checker is usable independently; an optional EUR 9 offline download supports multiple scenes, CSV import/export, JSON backups and print. This is a cast availability check, not a full rehearsal calendar or script parser.