Avi Schiffmann is an entrepreneur with a crazy idea that might become our new reality. After being on a podcast, he wondered about how he had presented himself. Instead of asking a human being for feedback, he asked a pendant he had been wearing around his neck during the recording. It told him he needed to be a better listener.

The round plastic bauble known as Tab, the main product of Schiffmann¡¯s wearable artificial intelligence startup, had a tiny microphone that fed a real-time audio recording of his daily interactions to an AI model. Tab had some tips. ¡°You ... abruptly changed the conversation topic,¡± the device replied via text to his phone. If Schiffmann had acknowledged something his interviewer said, that ¡°would have made you appear more thoughtful.¡±

Tab goes on sale next year for $600. A rival called Rewind will sell a similar pendant for $59. Tech giants are also exploring these products.