TOP NEWS Debuts iPhone App, the online coupon search engine service headed by Marc and Claudia Braunstein, said today that it has released a free, iPhone application, which allows users to browse and find online coupon codes, deals, and cash back rewards. The Denver company said the app features coupons from such retailers as Walmart, Best Buy, Macy's, Sephora and others. The firm said it already has a similar, iPad application called Coupon Codes Plus.