Love it! I was sceptical buying a cheaper device however this scale has outstanding build quality and the app works like magic. The scale is simple to use and I was about to with myself within 5 mins of getting it out of the box . The most time consuming part was registering for the Renpho app, but once that was done standing on the scale with Bluetooth on gives you lots of details on your phone. I'm not sure how accurate the readings are for bone density etc but the graph of your weight over time is amazing. The app also has a feature to export your data to another app, in my case "Google fit". You can add other profiles on the same phone for the app. But as my wife is weight conscious she would like her data on her phone. There is no mention of whether registering two devices to the one scale is possible in the instruction manual.