Do I have to use Bluetooth when connecting to the unit? June 30, 2023 00:33 Updated Yes, Bluetooth is required for the Gradient app to connect to the unit. Related articles Do I have to have WiFi to be able to use the Gradient app? Why does Gradient need access to my mobile device’s Bluetooth? What is Forget Wi-Fi? Why does my Gradient unit not show up when I am searching for Units to connect to? Can I control my Gradient unit when I'm not home?