The short story is that it's a weight loss app that is rooted in behavioral psychology. Each day, there are articles and prompts that are educational concerning relationship with food, healthy habits, and addressing the overall psychology and behavior around healthier eating and weight loss. Equally, there is food tracking (foods are collated into green, yellow, and red) and calorie counting relative to a daily calorie goal.
https://texags.com/forums/48/topics/3190389/replies/59051047 has a few more details and my experience with it.