Clipping paper coupons from the Sunday newspaper is an outdated practice. The entire discount industry transitioned to digital formats. Shoppers now use their smartphones to lower their grocery receipts. The most lucrative strategy in digital couponing is called stacking. Stacking involves applying a store discount at the register and then claiming a separate cash rebate through a third-party application. Retailers actively try to block this practice, but specific platforms still permit it. Here are 3 coupon apps that still allow stacking discounts in 2026.
