How to pair with smart phone via Bluetooth?
Open the App and follow set-up and pairing instructions:
1. Turn on Bluetooth on the phone and open the RENPHO Health App.
2. Register your account in the RENPHO Health App with email. Or you may login using Guest mode if you prefer not to register.
3. Click the Healthy icon.
4. Tape on the [+] on the top right corner to enter the "Add Device”page,
5. After choosing "Tape measure(Bluetooth)", go into "Search Device" page.
6. Press the on/off button to turn on the RENPHO device to pair with app. Pairing is successful when your metrics appear on the RENPHO Health App

Congratulations! You have successfully completed the first measurement, now you can check the metrics in the app.
Note:
iOS 13 requires Bluetooth permissions. If you do not enable it, even if you turned on Bluetooth, you will not be able to connect with the tape.
1.Go to setting on your iPhone.
2. Scroll the RENPHO Health App.
3. Switch on the Bluetooth permission.
https://renpho.com/