Luntrack is an all-in-one health tracking app that combines calorie counting, workout logging, and running data in a single daily log. It uses AI to identify foods from photos, provides personalized workout plans from 873 exercises, tracks runs with GPS, and monitors micronutrients. The app offers free core features with Pro and Elite subscriptions adding AI capabilities.
A study of 58 Hispanic adults found that popular smartwatches (Apple, Garmin, Samsung, Fitbit) significantly misestimate calories burned during exercise, with errors of 15-25%, and accuracy worsens as body fat percentage increases. The devices rely on heart rate and movement data combined with user demographics, but cannot directly measure caloric expenditure, leading to substantial inaccuracies that vary across individuals.