Losing weight can often come down to tracking what you're eating on a daily basis. In fact, a new study has found that keeping a food journal is the best strategy to use if you're trying to lose weight. Luckily, technology makes it easy to track what and how much you're eating, whether you're at home or on the go. In the market for an iPhone app to help track your diet? Check out the details on a few of the most popular food journal apps!