Fooducate, free

It can be easy to breeze through supermarket aisles and just throw whatever comes in a 100-Calorie pack into your cart. Fooducate is an app that lets you scan barcodes of foods, then see how healthy they are on an A through F scale, based on sugar, fat, carbs and other factors. You can also check out comments or reviews on items. You may even learn that those Ho-Hos are actually worth the fat because everyone agrees they're super delicious. Probably not, though.