The Appointments Pro PREMIUM yearly subscription will allow you to charge for the use of the Appointment Pro module as it extends its power by allowing Class bookings.
How to Activate Easy Appointments PREMIUM
The Appointment Pro PREMIUM subscription requires installation.
It requires only that you already have the Appointments Pro Base module installed on your SiberianCMS and that you installed the Appointment Pro premium module.
Google Calendar Sync is Coming soon.
1 year subscription / 99€