I have three blood glucose meters, one in my house, one in my car and one in my office. Or I have two blood pressure monitors, one at my winter home and one in my summer home.
This is a common question. The simple answer is yes. Each device that you install on the app has a unique MAC address to identify itself. As long as the device is connected to your app, you can use any device and the data will go to the same account.
Keep in mind, Bluetooth has a 10 meter (33 foot) range. If you have two devices within range of the app, there may be some confusion as to which device get connected. On all of our devices, when the device connects to the app, you will see a solid bluetooth symbol on the connected device. So, if you have two scales (his and hers) in the same bathroom, there may be some confusion over which one connects to the app first. Only on device of the same type can connect at once. Make sure that you move the device that you don't want connect out of range of the app.