If you choose to use the official software (trial or paid), it is a powerhouse for school scheduling: Export limited to max 10 cards/lessons - aSc Help
aSc offers a stripped-down, version called "aSc OneTeacher." This is designed for a single educator to plan their own personal schedule. It does not offer institution-wide reporting, but it is 100% legal and requires no registration code.
There is no official "Free Registration Code" for . The software operates on a freemium model where a registration code must be purchased from aSc Timetables to unlock full functionality. Trial Version Features vs. Registered Version