Setting a reminder in appinventor 2

I am working on creating an app for a local gaming convention. We would like to set this up to add reminders for the user to let them know that they have a game or panel that they want to go to. I would like to do this inside the app it self if possible but having it add a reminder to the phones calendar would work as well. can this be done in app inventor?

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the Google Calendar API tutorial is here: Google Calendar API / App Inventor 2 Tutorial

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To do this will I need to build it for each option of  can I build it once for an online calendar? Alternately is there just a way to call the calendar app like you can whit the email one?

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