Basic Event: If you do not wish to customize the RSVP form, then select this option. You will be given a URL that can be added to an email campaign to send or can be linked from your site.
Advanced Event: If you want to customize your RSVP form, then select this option. You will be given access to the source code, which you can give to your developers to integrate into an HTML email or directly into your site.
RSVP Manager:
The mobileStorm RSVP Manager allows you to gather a chosen number of names and/or addresses to be placed on an RSVP list for a particular event. You can schedule a close out time/date as well as a cut off total. You can then export and print the list for reference the night of the event.