He's 26. Apple offered him $8.4 million for the tongue-controlled retainer he 3D-prints in a San Diego apartment on a $180 Prusa. He said no The retainer sits inside your mouth like an Invisalign tray. Inside it: a miniature accelerometer array wired to a Bluetooth LE chip, all encapsulated in medical-grade epoxy he sources from a Kearny Mesa dental supply company for $28 a bottle. It reads tongue and bite pressure patterns at 240 samples per second, translates them into cursor movements and click gestures, and streams the output to any device paired over Bluetooth. Total hardware cost per unit: $47. He wears his own retainer eleven hours a day and hasn't touched a mouse in six months He posted a demo video to Reddit r/AssistiveTech in October showing a full 47-minute Cursor coding session controlled entirely with his tongue and bite gestures. The post hit the front page in nine hours. An Apple Accessibility engineer found it through a Hacker News crosspost three days later. Tim Cook quote-tweeted the demo the following Wednesday - called it "the accessibility hardware Vision Pro should have shipped with." Apple's business development team wired an $8.4 million acquisition offer to his lawyer in November for the retainer design, the embedded firmware, and a three-year exclusivity contract that would make Apple the only distributor globally. He declined the offer in December. His public statement was seven words: "This should be open. Everyone needs it." He open-sourced the firmware and STL files on GitHub the same day Apple Vision Pro burned $3.5 billion in R&D on the premise that spatial computing input requires their proprietary hand-tracking silicon and their multi-year hardware roadmap. Neuralink raised at $2 billion on the same premise for neural implants. Tobii runs at $340 million selling eye-tracking hardware to accessibility clinics at $12,000 per unit. He runs a Prusa in a San Diego apartment printing a $47 retainer that a nine-year-old with cerebral palsy in Argentina downloaded and printed at her local library last week