Aion Core is the open foundation under the Aion app: a private FHIR knowledge graph on your phone, and a local bridge that serves it to any AI assistant, your terminal, or your own code — with one command, no server, nothing leaving your network. Free and source-available.
Every source — labs, vitals, meds, conditions, wearables — is normalized into a FHIR R4 knowledge graph on your phone. Standard resources, standard codes (LOINC, SNOMED, ICD-10), 20 resource types — ready to query from anything that speaks HTTP, MCP, or WebSocket.
Your Digital Twin
20 resource types · Encrypted · On your device
Query your own FHIR record from any AI assistant, your shell, or your own scripts — over your LAN, with one command, no server.
A single npx command connects any MCP-compatible AI assistant — and your terminal — straight to your phone’s live FHIR data. Ask “What’s my BP trend?” and get answers grounded in your real records.
Requires Node.js 18+. Phone and PC on the same WiFi (or USB).
Want a standing HTTP API and a browser console? Run the open-source aion-open server and point any tool — curl, notebooks, your own apps — at localhost:3000. Run local models with Ollama.
Most people never need this — the one-command path covers the common cases.
A tray app that sends your computer activity to your health graph — anonymized, categories only, on-device. Your graph can then surface correlations like “BP higher on weeks with >6h meetings.”
Available now as source · packaged installers coming soon.
The bridge, the shared core, the dev console — all open under PolyForm-Noncommercial. Inspect exactly how your data is handled, or build your own tools on the same FHIR surface.
Data never leaves your network. Multiple layers of protection.
Full REST API, CLI reference, and code examples live in the aion-open README — a standard HTTP + JSON surface, no SDK required.
Zero Mile Health
Your health data has always been yours. The problem is no one lets you use it. It sits in portals you can barely access, locked in formats you can’t read, controlled by systems that don’t answer to you. Aion changes that. Your data lives on your device, encrypted, private, and queryable — a FHIR knowledge graph that you own completely. On-device AI gives you intelligence that works offline. Go online when you choose, with your own models, on your terms.
But the real power isn’t just access — it’s what you build with it. Correlate your medication adherence with your sleep. Build a dashboard for your family. Visualize your risk trends over time. Ask any AI you trust about your real records. We don’t know what you’ll build for yourself. That’s the point.
We believe essential healthcare should be universal — meeting people where they are. Aion is the start of something different: a digital twin that knows your complete story, and AI that reasons about you — first on your device, then on your network, then with any model you trust. Health at zero miles — in your pocket, understanding you better every day.
This is early. This is open. Build something amazing.
Free for personal & non-commercial use under PolyForm-Noncommercial-1.0.0 · Commercial licensing available · Source at github.com/easpencer/Aion