While both options will provide a functional Thermo experience, we would advise that you install your Thermo in Wi-Fi due to some practical advantages over Bluetooth-only usage.

Configuring your Thermo in Wi-Fi ensures that:

• Your measurements are sent to the app even if your phone isn't next to you.
• Updates are done automatically when they become available.

Important Notes: 

• If the Thermo is being operated by multiple users, every user needs to have the device installed with the same connection (either Wi-Fi or Bluetooth). Data will not sync correctly if all users are not connected in the same mode. 
• If you want to switch from a Wi-Fi configuration to a Bluetooth configuration, you’ll need to dissociate your Thermo and install it again from scratch.