All the fitness and diet apps make it just worse Fatty eats a portion bucket of pasta that could feed a family of 8 -> Enters one portion of pasta in MFP. "I only had 400kcal for lunch, I've been such a good girl. I deserve a chocolate barteeehee" Fatty gos for a slow walk and uses a fitbit or fitness app "Ohhh look, I've just burnt 800kcal during my exercise, now I deserve a pizzateehee"  Don't get me wrong, I'm a huge fan of cronometer and even have one of these apps that track how much I walk - but the calorie apps don't work if you simply guess portion sizes because fatties think their massive portions are normal, so they underestimate their calorie intake. And "forget" to enter all the stuff they nibble on during the day. Think about Secret Eaters -> Thinks it eats 1300kcal, actually eats 4000kcal. Every. Single. Time.  With fitness apps it's the other way round - they usually overestimate the amount of calories burnt. A bit of walking doesn't burn that much yet my app tells me I'm burning an additional 500kcal every single day...  The result are all those fatties out there claiming to be super active, living a healthy life, only eating a few calories and still "can't lose weight".