A paper diary works until two people book the same slot, or a patient calls to move a visit and the change never reaches the doctor.
A digital book ties each appointment to a doctor, a time and a status: pending, confirmed or cancelled. Reception can see the gap before offering it to someone else.
Rescheduling should move the visit, not create a second one. The original slot then opens for another patient.
Doctors benefit when the day's list is the same list the front desk is using. There is no separate printout that went out of date at 11 am.
Clinivaan connects the doctor schedule with appointment booking so the clinic is working from one timetable.