The problem with most daily deal sites is that the bargains you're offered aren't necessarily the ones you want. That's where Amazon thinks it can gain an advantage, by leveraging its signature product recommendation technology.
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, on gas, groceries, and goods sold online. We took them for a test drive and slashed our shopping tab by nearly $70.