Yes, absolutely. You can set the exact number of minutes prior to each appointment that reminder text messages and/or emails should go to your clients.
Go to the Set Up tab -> choose on "Emails & Text Messages" -> click on "Reminders":
You will see the page where you can edit the content of the reminder email and text messages. You will also see a field that you can enter how many minutes before each appointment the reminders should go out. Click on the "Edit" button to proceed:
If you need to set up multiple reminder emails and texts on different times, kindly click on the link below for step by step instructions: