Rewind Pendant: a wearable that captures what you say and hear

The ship for covert audio recording has sailed many decades ago, around the time Dictaphone trade mark being registered by Alexander Graham Bell.

I don't understand these sorts of responses. There's a world of difference between a device that could be abused to spy on people and a device that is designed and intended to do so.

Also, just because there are existing ways to do the Bad Thing doesn't mean we should accept new ways of doing the Bad Thing. Particularly when the existing ways have enough friction that they require someone to intentionally decide to spy, rather than accidentally doing so.