The 5:2 Diet is a fast diet, which means that for 2 days of the week you limit your calorie intake and for the remaining 5 days of the week you eat normally. This simple way of eating has proved extremely effective at weight loss, with thousands of success stories reported around the World. The hardest part is to keep yourself motivated on those fasting days... that what this app does for you. This app is not affiliated with the The Fast Diet or the 5:2 Diet Book.