Yes. I just flipped it around and yes it can be worn on the underside of the wrist. Simple answer.
FYI - if you were wondering if it reads your heart rate while flipped the answer is seemingly also yes - uncertain of the accuracy but it does register.
According to their site and documentation, no. If you're wearing it simply as a timepiece and notifications device, sure... but evidently not for any of the physical fitness and sensor data.
Yes. I just flipped it around and yes it can be worn on the underside of the wrist. Simple answer.
FYI - if you were wondering if it reads your heart rate while flipped the answer is seemingly also yes - uncertain of the accuracy but it does register.