The Product
Track. Understand. Relieve.
Fern turns your daily check-in into personalized wellness guidance — matched to your cycle phase, your symptoms, and your body.
Fern tells you what to do.
Real-time cycle phase detection — menstrual, follicular, ovulation, luteal — calculated from your logged data.
Daily check-in produces Nurture, Flow, and Nourish scores — your personal wellness snapshot.
14 curated remedies across yoga, nutrition, lifestyle, and mindfulness — matched to your cycle phase.
PCOS, endometriosis, PMDD, thyroid — captured at onboarding, woven into every recommendation.
Five sliders — mood, stress, sleep, energy, symptoms. Quick enough to become a daily habit.
Specific, actionable recommendations for nourish, flow, nurture, avoid, and prepare — every day.
Fern's wellness engine is powered by a formal optimization model from operations research — accepted for publication in one of the field's top journals.
A formal optimization framework for women's health — the math behind the app.
A data-driven guide to cycle-based wellness. Turning academic research into everyday impact.
Built by Apurva Arni with a background in optimization science and applied mathematics.
All data lives on your phone. Always.
Open the app and start. No sign-up required.
Your data is never uploaded anywhere.
No analytics. No ads. No third parties.
Fern is launching on the App Store Q2 2026. Be the first to know.
Get Early Access