Bill Erickson

More formal documentation is coming, <a href="https://wordpress.org/support/topic/plugin-interstrategy-events-manager-documentation?replies=5#post-2393218" rel="ugc">but here’s a start</a>

Interstrategy Events Manager

Jerin K Alexander

This plugin can use to send reminder mail to all the attendees who are going to attend the event
Install the plugin 
Go to ‘reminder email’ under Tools section. 
Select the events and send the email
—Important —
You must install events manager and events manager pro plugin before activate it.

Events Manager Pro – extended

This plugin can use to send reminder mail to all the attendees who are going to attend the event

Interstrategy Events Manager vs Events Manager Pro – extended