How We Built It
We studied 13 production agent systems — from enterprise platforms to open-source frameworks — and took the best ideas from each. Then we built something that works offline, respects your privacy, and costs almost nothing to run.
The Brain on Your Phone
Your Readiness Engine
A score that tells you how sharp you are — computed entirely on your phone from sleep, heart rate variability, circadian rhythm, and movement. No internet needed. No data leaves your device.
Speaks to Every Watch
Native Swift and Kotlin modules that talk directly to Apple HealthKit and Android Health Connect. Your watch already collects the data — we just make it useful.
The Smart Skip
Most of the time, your body is fine and the AI doesn't need to run. A simple rules engine catches 60-80% of checks — meaning zero AI cost for the majority of your day.
The Agent That Speaks
Powered by Claude
When the agent does speak, it uses Anthropic's Claude — the same AI that powers tools engineers love. Personalized, empathetic, and never generic.
13 Systems in One
We didn't invent from scratch. We studied the best — from enterprise agent platforms to open-source frameworks — and distilled the best patterns into a single architecture.
Serverless Backbone
The backend runs on Supabase Edge Functions — serverless, scalable, and cost-effective. Checks run every 15 minutes, quietly, in the background.
Privacy as a Feature
Military-Grade Encryption
Your health data is encrypted on your phone with AES-256 — the same standard used by governments. Not even we can read it.
You Only See Yours
Every database query is locked to your account. Row-level security means even if someone broke into the server, they couldn't see your data.
We Don't Log Your Health
We never log your actual heart rate, sleep hours, or stress levels. Period. We track what the agent did, not what your body said.
What Powers OneSync
Mobile App
React Native + Expo
One codebase, both platforms
Design System
NativeWind + Tailwind
Beautiful, consistent UI
Health Data
Encrypted SQLite
AES-256 on your phone
Cloud
Supabase
Postgres + Edge Functions + Auth
Intelligence
Claude by Anthropic
Empathetic, personalized AI
Delivery
Telegram Bot
Messages that reach you first
Why These Choices
Why compute on your phone?
Because your readiness score should work without WiFi, respond instantly, and never send raw health data anywhere. The science behind it is grounded in SAFTE-FAST — the same model the US Army uses for fatigue risk management. We adapted it for everyday life.
Why Telegram, not an app?
Because 88% of health app users stop opening the app within 30 days. Dashboards are beautiful and completely useless if nobody looks at them. A Telegram message that arrives at 7am is fundamentally different from a score waiting in an app. The delivery IS the product.