DIY Activity Tracker: Count Your Calories More Accurately than a Smartphone.

Physical activity is essential to both physical and mental health, something brought home to many people following sedentary pandemic lockdowns. Even without the lockdowns, many parts of the world have been facing an obesity epidemic, which has created a need to help people manage their weight. For such people there are a wealth of fitness and diet apps that rely on smartphone and smartwatch sensors to monitor activity levels and track the calories they have burned. The problem is that smartphones and smartwatches do a terrible job at calorie counting. [ABSTRACT FROM AUTHOR]