Yes, Apptoto will scan your appointments for phone numbers and email addresses, and turns each phone number and email address found in the event into a participant for that event. Each participant can then receive reminders and can confirm, cancel, or request rescheduling. This feature can be managed via the “Settings”>”Auto Participants” tab of your account.
If you want to include a phone number and email address for one participant, then you can include them separated by a comma. e.g. "Fred 650-555-1212,email@example.com " would result in only one participant being tracked, whereas "Fred 650-555-1212 Wilma firstname.lastname@example.org" would result in two participants.