VitaSync — Know Your Hormones, Feel Your Best

Inspiration

1 in 10 women lives with PCOS — yet most spend years being dismissed, misdiagnosed, or handed a pamphlet. We kept asking: what if your body could tell you what's happening, in real time? What if the most intimate moments of your life became the most powerful data points for your health? That question became VitaSync.

What it does

VitaSync turns intimate wellness sessions into hormonal health intelligence. A sensor-embedded device captures heart rate variability, body temperature, and pelvic floor EMG signals during use. An on-device ML model infers oxytocin response and cortisol fluctuation — two hormones critically disrupted in PCOS — and maps them against the user's menstrual cycle phase. The result: a beautiful, clinician-ready dashboard that shows not just what your hormones are doing, but why, and what to do next.

How we built it

Frontend: Mobile-first H5 app built with React — fully interactive, 8 screens, real-time animated sensor visualisations with a soft pink-white glassmorphism design language
Backend: Node.js + Express REST API handling session data ingestion, hormone index computation, and user health profile management
Database: MongoDB for flexible health record storage; time-series sensor data stored per session with cycle phase metadata
AI layer: Supervised learning model (LSTM + XGBoost) served via a Node.js inference endpoint — trained on paired sensor and biomarker data, proxy biomarkers validated against published HRV–cortisol literature
Insight engine: LLM integration via Anthropic API — structured health context (cycle phase + PCOS profile + session deltas) passed as prompt context, constrained to evidence-based recommendations only
Auth & privacy: JWT-based authentication, all personal health data encrypted at rest, GDPR-compliant consent flow

Challenges we ran into

Hormones can't be measured with a wristband. Building a credible proxy model — one we could defend to both engineers and clinicians — required deep literature review and careful feature selection. We also wrestled with how to present sensitive health data without triggering anxiety, and how to design a product that feels empowering rather than clinical.

Accomplishments that we're proud of

A fully working mobile demo built in under 24 hours
An AI architecture grounded in peer-reviewed science, not speculation
A design language that makes women's hormonal health feel beautiful and approachable for the first time

What we learned

Data alone doesn't change behaviour — story does. The most important design decision wasn't the model architecture; it was making sure every screen answered the question a real woman would ask at 2am: "Is this normal? What should I do?"

What's next for VitaSync

Clinical pilot with 50 PCOS patients to validate proxy biomarker accuracy. Hardware partnership for sensor integration. GDPR-compliant data infrastructure. And ultimately — a product that makes every woman feel like she finally has a doctor who listens.