The Andy's Frozen Custard loyalty app is an iPhone application designed by Paytronix Systems Inc for food and drink enthusiasts. It allows users to join the Yum Squad and earn points for free treats. Upon signing up, the user gets a free treat following their first visit. The more you visit, the more points you earn, and 50 points equal a free $5 treat.

One of the convenient features of the app is the ability to check in and let the store know you've arrived, which will earn you points. In addition, the app offers a contactless payment method, making it fast, simple, and secure. The app also includes an extended menu of delicious frozen treats, store locations, hours, and directions. Users can view their account balance and rewards and combine gift cards. The app also allows users to submit feedback directly from the app to let the developers know how they're doing.

Overall, the Andy's Frozen Custard loyalty app is a convenient way for lovers of the frozen custard chain to earn free treats and stay up-to-date on the latest store locations and menu offerings.