You have the option to send up to 2 reminders. The first reminder can go out 1, 2, or 3 weeks before the appointment and the second reminder can go out 1, 2, or 3 days before the appointment. (The most common options are 1 week before and 1 day before).
You can edit your reminder settings under Setup > Client Email Settings.
Reminders will be sent by email or by text message (depending on the client’s preference as indicated on their client file). Note that text reminders are only available on our Grow and Pro plans.