Malnutrition refers to deficiencies, excesses or imbalances in a person’s intake of energy and/or nutrients and can be the ground for both communicable and NCDs. Nutrition is essential and Energy Expenditure (EE) assessment in an individual’s daily routine is the key to it as both under nutrition and over nutrition are detrimental. Currently, an individual is categorised as sedentary/ moderate/ heavy worker based on the Metabolic Equivalents (METs) of the activity and the duration it is performed. MET values are given for the activity as such but using this to classify an individual sedentary or moderate or a heavy worker is not appropriate especially when duration of activity is less than 10 minutes. As there is no single effective tool available to calculate Total Energy Expenditure (TEE), a new concept was developed to calculate TEE using its 3 components Resting Energy Expenditure (REE), Activity Energy Expenditure (AEE) and Diet Induced Thermogenesis(DIT). (Copyright office, GOI Registration Number: L-84886/2019)Based on this concept, a simple android application has been developed, 24 hour Activity Recall Method abbreviated as “24 ARM”.