More than 47 million people worldwide have used the program and it topped Google's Top Trending Diets #YearInSearch for 2018. Beating out "vegan" "paleo" and "intermittent fasting." What's more? Unlike other buzz-worthing meal plans, it's not an elimination diet which means every food group is on the menu. Unlike other calorie tracking apps focus on making behavioural changes surrounding dieting and weight loss.
Noom asks new users to take answer a few questions about their body type, activity level and goals. Then you're assigned a program based on a traffic light system similar to the Weight Watchers point system.
"Each of our users has a personalized calorie budget based on age, sex, activity level, and more," says Adam Fawer, the CEO of Noom told Shape. "This colour-coding takes both the quantity and quality of food into account," says Fawer. "Even 'red' foods are expected to make up a fair allotment (about 25 per cent) of your daily caloric intake."
Foods with low-calorie densities are "green," and are supposed to make up most of your diet, while "yellow" foods are to be eaten moderately, and "red" items are to be consumed occasionally.
Here's an example for each category:
Skim milk and nut milk
Grilled poultry and seafood
This article originally appeared on InStyle.