Food tracker apps are on everyone’s smart device.  MyFitnessPal Calorie Counter has over 50 million downloads!  The USDA SuperTracker has over 27 million users.  LoseIt, SparkPeople, FatSecret- there are dozens of food diary apps that allow you to record what and when you are eating.  The question isn’t ‘Are you using one?’ but ‘Which one are you using?’  And maybe more importantly, are these tools really useful?