Halo — Navigation You Feel

Finding someone in a crowd of 40,000 means staring at a blue dot and hoping. Halo skips the screen entirely: a band around your head taps in the direction you need to go, and gets more insistent as you close in.

Under the hood, sub-GHz radios trade ranging packets peer-to-peer — no cell service, no GPS lock, no infrastructure to install at the venue. An onboard IMU resolves which way your head is actually pointed, so the bearing stays true when you turn.