The iPad can be a great tool to stay on top of your diet. This pricey but incredibly feature-rich app allows you to track just about every aspect of your health a diet secret: You could eat nothing but grapefruit or nothing but chocolate or nothing but pulled pork, and as long as you end up with aOur picks for some of the best apps to monitor and improve diet and fitness. Article; Stock Quotes; Comments. more in Retirement Planning ...