(Daily Finance) — You paid a lot for your iPhone, so why not use it to earn back some of that dough? Here are seven apps — all free — that can save you hundreds of dollars a year. We took them for a test drive and slashed our shopping tab by nearly $70. Price Check: Ever wonder if you’re getting the best deal? There are quite a few apps that promise to scan barcodes and compare prices, but this one is by far the easiest I’ve used. You can scan a barcode, take a photo, or even just say a product’s name, and Price Check will find matches at Amazon.com and any of its hundreds of partners. If the app turns up a better price, just click to buy and save.