JemmaPass is a universal health passport that fits in a QR code, speaks 25+ languages, and works without internet — even when cell towers have collapsed after an earthquake. It runs entirely on your Android phone, powered by Gemma 4 via LiteRT.
Who is it for? A Belgian pilgrim on the Shikoku Henro trail. A grandmother in rural Aomori. A trekker in the Himalayas. A refugee in Jordan. A volunteer responding to the next Noto earthquake. They all need the same thing: to be understood medically, accurately, in seconds, by anyone who finds them.
Why does it matter now? Three things happen in 2026: (1) Gemma 4 makes real multimodal AI fit in your pocket. (2) HL7 IPS R4 matures into a stable international health-record standard. (3) Google Nearby Connections delivers peer-to-peer mesh that survives network blackouts. We are the first to fuse all three into a single offline-native Android artifact.
How does it work? You build your medical profile by voice or by scanning your medication boxes (no typing). Gemma 4 maps everything to professional clinical codes (SNOMED CT, RxNorm, ATC, LOINC) using 49 native @Tool function calls into our embedded 3.36 GB knowledge base. The result compresses into a 500-byte QR code that any phone camera can read — with or without our app.
The killer moment. A first responder scans an unknown patient's QR badge, then scans the antibiotic she's about to administer. JemmaPass instantly flags a beta-lactam cross-reactivity with the patient's penicillin allergy — in any language. No cloud. No latency. No medical training required. Anaphylaxis avoided.
Most medical apps assume reliable internet — exactly the assumption that fails in disasters, in transit, in mountains, in rural clinics.
A FHIR bundle authored in Brussels is unreadable to a Tokyo ER doctor. Free-text medical records evaporate at the language border.
Cloud-based health apps leak PHI by design. Users must trust unknown servers with their most intimate medical history.
JemmaPass is the personal project of Claude Heyman, who has walked the 1,200 km Shikoku 88-temple pilgrimage (Ohenro) three times between 2016 and 2023, and served as a solo volunteer for ten days in Himi (Toyama Prefecture) following the Noto Peninsula earthquake of January 2024 (M 7.6 JMA / M 7.5 USGS).
Walking the Henro alone with no Japanese language taught me what it means to be medically illegible when separated from your home health system. Helping in Himi taught me what happens when networks die and paper records are buried under rubble. Both experiences fed directly into the architectural decisions you'll find in the code.
"I built JemmaPass for the version of every pilgrim who needed it on Shikoku, alone, in a torii's shadow at dusk — and for the responders in Himi who, in January 2024, were trying to triage patients whose records had vanished with the cell towers."
Pick your next stop. Each path tells a slightly different story about the same project.