The app lacks decent navigation, and other quirks but I finally figured it out through trial and error and reading the directions very carefully, several times in my case. The key for me was the pairing and you
must pair the model of the device as instructed in the manual with your phone Bluetooth after filling out the basic info and Voila! The scales will input your promised data into your app. Then it is full speed ahead, I hope. I also checked online for optimal BMI, BF, Muscle Mass, Bone, etc for my age, height, weight, etc., and compared my results from the scale. The app should be more user friendly, nonetheless.