In a similar vein, instead of digressing into music, Apollo Neuro and others have recently popped up with wearables that claim to affect mood/focus/etc. by gene

In a similar vein, instead of digressing into music, Apollo Neuro and others have recently popped up with wearables that claim to affect mood/focus/etc. by generating rhythmic tactile pulses. Still skeptical, but it doesn't seem as completely snake-oily as a lot of other stuff out there either.