I built a copy of the Emma Watch and tried it out on myself. Despite trying many frequencies and patterns, it had no effect whatever on the Parkinson's Disease tremor in my left hand. Despite a diligent search, I haven't found any evidence of the Emma Watch working on anyone besides Emma.

Microsoft came out with the Emma Watch with great fanfare in 2017 and they've obtained a patent on it but no further results have been released. The media seem to have uncritically accepted the premise without proof that the Emma Watch will help PD patients with tremor. I'm concerned that Microsoft has raised a lot of potentially false hopes in many people with PD.

I posted a YouTube video "Does the Emma Watch work for anyone besides Emma" about my experiments with a copy of the Emma Watch that I built. It's not hard at all to make and I plan on posting another video on how to make one.