Over 86 million people in the U.S. use some kind of fitness or calorie-tracking app, making them one of the most common, easily accessible data-crunching tools around. Their appeal is ...

The promise is seductive: Snap a photo of your meal, and artificial intelligence will instantly tell you exactly how many calories you're consuming. No more tedious ...

Some users of popular fitness and calorie counting apps experience shame, disappointment and demotivation, potentially undermining their health and well-being, according to a new study led by ...