6 smartphone shopping app traps
Apps such as Groupon, Rue La La and Gilt Groupe present you with must-have items or special deals with a daily purchase time limit. Belsky says these make you think you're missing out if you don't purchase immediately. Bookmark it and re-visit it toward the end of the purchase time period, if you even remember it that long.
Ask yourself: Do I still want it? Will I use it? Can I afford it without using credit cards?