Send a WhatsApp message via Spoki to a user when you create or update an event on your Google Calendar. In order to do it, just put the user's phone number (including a prefix, e.g. "+393331234567") in the description field on the Google Calendar event.
Google Calendar lets you organize your schedule and share events with co-workers and friends. With Google's free online calendar, it's easy to keep track of your daily schedule.