Visit Kroger.com or the Kroger app on your phone to download a digital coupon for one free PowerBar single bar! Choose between a PowerBar Protein or Clean Whey Bar. The digital coupon is only available for download today until 11:59 p.m. PST. The Kroger eCoupon must be redeemed by 9/3, and there is a limit of one per shopper’s card. This is a digital manufacturer coupon that cannot be combined with a manufacturer coupon.