If I purchase a groupon voucher, do I have to print it out or can I just bring the email on my phone?

No, they will scan your phone.

We're so glad you're going to be visiting us! I would suggest printing the voucher, make sure you do not redeem it until you get to the park. We've experienced some people having issues pulling up there Groupon voucher on their phone due to internet connection issues so having the print out will keep you from having to wait. It's always better to be on the safe side so you can enjoy the park once you get here! :)

No, just show them on phone. They would mark it as consumed and issue band right away...

I use the Groupon app and just showed it to them

I printed it just to be on the safe side.