6 smartphone shopping app traps
Games and rewards
Apps such as Foursquare, Shopkick and Scan It! can contribute to that feeling of power for many because they present you with coupons, deals and savings while you're standing in the store. But they also encourage visiting establishments more often and spending more to get the rewards, Belsky says.
Ask yourself: Do I have the willpower not to spend money to earn rewards if I don't need the items in the first place?