By signing up alone, you can get a free doughnut and join Krispy Kreme Rewards. Another way to join Krispy Kreme Rewards is to download the app. Every time you purchase a Rewards Track item, you receive one credit. You get a free doughnut after your twelfth purchase. It is also easy to claim your reward as you need to place your order, scan your rewards app or give the Krispy Kreme Team Member your phone number or email address.