yeah it can be finicky. Make sure blue tooth is on. You have to connect to Weatherflow first and go to Settings, Calibrate Compass. Follow on screen directions. Once it is calibrated select done and go to strelok and click on the blue tooth icon. It should connect to weatherflow. Once connected in strelok, hold weatherflow pointing towards target and select calibrate on strelok. Yes it is a lot of steps, but once everything is synced up it works great. Hope this helps.