How do I set when clients can book or cancel an appointment?

Open Appointfix and go to Menu → Settings → Online Booking → Booking Policy to set when your clients can book appointments.

There you will be able to set when you allow your clients to book. This setting will affect the availability of the time slots displayed for booking.

To set when clients can cancel their appointments, please open Appointfix and go to Menu → Settings → Online Booking → Cancellation Policy.