Download the Wendy’s app and login or register. Then go to offers and click the “free Dave’s Single w/ purchase” offer. Click add to order, then add a Dave’s Single to your cart.
Then go to the menu items, click Frosty and select Vanilla or Chocolate and select the junior size and add to cart. The frosty should show as $0 in cart, and your order total will be $0. Click place order and pick up at the drive thru.