Cal AI’s founder unveiled Persona, a screenless AI agent worn on the wrist
Zach Yadegari’s 27-gram aluminum band has no display: two microphones, a speaker and an LED ring, woken by raising or tapping the wrist. Preorders are $179 against a $219 list price, the battery lasts three days and shipping is set for December 2026. MyFitnessPal acquired Yadegari’s calorie-counting app Cal AI. Under the terms of service, the user is held responsible for the agent’s mistakes, including instructions it misunderstood.
Sources
- Persona, “Persona Band: First AI assistant you can wear” (yourpersona.com)
- Persona, “Terms of Service | Persona”, (yourpersona.com)
- X, Zach Yadegari's post on X introducing Persona, (x.com)
- TechCrunch, “MyFitnessPal has acquired Cal AI, the viral calorie app built by teens”, (techcrunch.com)
About this story
This story was posted on Instagram by @jarrus.tech on Sept. 22, 2026.
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Short link: thejarrus.com/en/persona-wristband
This story in Turkish: Cal AI’ın kurucusu, bileğe takılan ekransız ajan bilekliği Persona’yı tanıttı
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