A Smartphone Healthcare Application, , to Promote Weight Loss: A Randomized Controlled Trial.

Mobile applications are increasingly used in healthcare. We have developed a smartphone healthcare application, , that can register daily diet, exercise, mood, and sleep quality, calculate dietary intake, and provide advice using artificial intelligence technology. This 3-month randomized controlled trial tested the hypothesis that could promote body weight reduction in Japanese adults with overweight or obesity. We recruited office workers as participants. The key eligibility criteria were an age of 20-65 years and a body mass index of 23-40 kg/m. The primary outcome was body weight change over 3 months. We enrolled 141 participants and randomly assigned them to the intervention ( = 72) and control ( = 69) groups. The intervention group used , and the control group did not receive any intervention. The change in body weight was -2.4 ± 4.0 kg and -0.7 ± 3.3 kg in the intervention and control groups, respectively. An analysis of covariance adjusted for related variables showed a significant between-group difference in body weight change (-1.60 kg; 95% confidence interval -2.83 to -0.38; = 0.011). The present study suggests that effectively promotes weight loss.