For Casey's 24 Days of Rewards, today you can get a Free Hashbrown at Casey's at Casey's General Store with the app. While supplies last. At participating locations. Find this in Offers under the 'Rewards' section. Save offer in the Casey's app or online to redeem in-store. You must be a Casey's Rewards member (free to join) to get this freebie. As a Rewards member, you'll earn points on all your Casey's purchases – in-store, online, or at the pump.