You have the option to set up an additional email reminder in Minup, and you can also customize it to be sent to your client a specific number of hours or days before the appointment starts.
Step-by step guide:
Go to Admin page.
Go to Services.
Click on the “Edit” button on the service where you’d like to set additional reminder.
In the Notifications section, and under Before the appointment select Add a second reminder.
Set how many days or hours before the appointment the reminder should be sent to the client for that specific service.
Once you're done editing, click Save.
Optional: You can customize the second reminder email template in the Email templates section. Learn more.