Today, smartphones have become a central part of our lives. These phones come with lots of apps that can do virtually anything. As a smartphone user, I bet you already know about several apps that you can use to entertain yourself, as well as to save or earn extra money. 1. Take Simple Surveys And Put Cash Back In Your Wallet The Swagbucks mobile app is one of the best, legitimate paid survey apps out there. You can get free gift cards and cash for the everyday things you do online. Swagbucks has already paid out over $192,195,020 in cash and free gift cards! They’re currently rated an A+ with the Better Business Bureau. The questions are pretty simple, like Where do you buy your coffee and What type of appliances do you own ? You can usually earn about $5 for 30 minutes of work. 2. Get a Refund For Stuff You Already Bought Stores change their prices all the time. Paribus is a free online tool that checks your purchases t...