Today’s featured promo on MacUpdate offers HealthEngage Diet+Fitness 3.9.2 for US$29.95 (50% off, retail $59.99). HealthEngage Diet & Fitness lets users plan their meals from over 6,700 foods in the USDA database. It also lets users choose daily activities and exercises with pre-calculated calorie burn rates from over 650 activities from the Sports Medicine Association of America. HealthEngage Diet+Fitness 3.9.2 requires Mac OS X 10.1 or later.