The Zeffy feature I wish I had discovered first would be the Zeffy Tap Pay app. There was a great feature to add to Zeffy. However, I wonder if the app would work for a tablet for a vendor or fundraiser event. I think it would be cool to use your tablet if connected to wi-fi as a backup to accept payment with the Zeffy Tap Pay app and check in guests. If you have experience doing this task, please chime in...I would love to hear your story.