One study found that consistent tracking of physical activity helped with weight loss. Meanwhile, a review study found a positive correlation between weight loss and the frequency of monitoring food intake and exercise. Even a device as simple as a pedometer can be a useful weight-loss tool. Truuburn Keto Researchers estimated in 2017 that there would be 3.7 billion health app downloads by the end of the year. Truuburn Keto Reviews Of these, apps for diet, physical activity, and weight loss were among the most popular.