iStudiez Pro can handle A/B Day (Week) Schedule.

For example, your classes start on September 1.

Add a new regular class, set it to repeat "Every 2 working days".

Start Date for A-day classes should be September 1.

Then, add classes for B-Day.

Add a new regular class, set it to repeat "Every 2 working days".

Start Date for B-day classes should be September 2.

If your classes run on A/B Week schedule "Every 2 weeks" repeat option should be chosen when adding regular classes.

Don't forget to set a correct Start Date for classes.