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?
"Convenience always wins," Schiavone says. "If there is something unique that you want and you can get wherever you are right now, you are more likely to spend."
David Ackerman, a marketing director in Florida, sees the trend every day. "I do see shoppers using mobile phone apps for price comparison and pounding the pavement from place to place taking advantage of deals, but what they don't realize is the more goods they're exposed to, the more impulse buying they will do."