I know some families that swear by their Healy, a MLM-marketed device that claims it can help ease muscle tension and a whole swath of other health problems, using electric diodes or even just resonate frequencies over the air.

While I think there's something to it, after seeing the app, though, I question its legitimacy. It claims to scan your biosignals by placing your thumb on the phone screen and it has a progress bar that variably increases at the exact same bezier curve rate every time, and then it computes the optimal vibration program for you. But phones don't have hardware or at least the APIs to do that, I'm pretty sure?

But I can't argue that it has seemed to help tame migraines, placebo or not.