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Finalist

@lujstn (Lucas Johnston Kurilov)

Built at GPT-6 Astra Hackathon London · Oct 6, 2026 · London, UK

@lujstn (Lucas Johnston Kurilov) — Demo video

Cereal is a live interpreter and translation app for two people who don't share a language, sharing one pair of AirPods. I’ve had the idea and some designs for an while, but tonight is the first time I built it as a web app that you can add to our iPhone's Home Screen, matching the native app's design: the other person speaks into their AirPod, you hold the orb to reply through your phone's mic, and the transcript card flips to face whoever is listening. I also created a tab called “Write” which uses GPT-6 Astra to track your family; it can tell apart your father and grandmother, renumber when they need different words (e.g. ты or Вы?), and lets you steer it with your own small notes.

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