Eluna Cycle: Period Tracker

Eluna Cycle — your period and cycle, written in the stars.

Eluna turns cycle tracking into something you look forward to: a calm, celestial companion that predicts your period, ovulation and fertile window — and gently explains what's happening in your body each day.

At its heart is your living Moon — a beautiful ring that shows today's cycle day and phase at a glance, paired with a personal daily insight written for exactly where you are in your cycle.

WHY YOU'LL LOVE ELUNA
• Accurate predictions — period, ovulation and fertile days, each with a clear confidence level so you always know how sure the forecast is.
• Two modes — Track your cycle, or switch to Plan Pregnancy (TTC) for conception-focused guidance.
• Daily insights — personalized notes on your skin, body, energy and mood for every phase.
• Log everything — symptoms, flow, moods and notes, plus your own custom symptoms and categories.
• Real analytics — cycle consistency, flow dynamics, a symptom heatmap and prediction accuracy over time.
• Understand your body — a built-in library of 450+ evidence-graded articles, with the medical sources cited right where the app makes a claim.
• Smart reminders — never miss your period, medications or fertile window.
• Make it yours — Moonlight light & dark themes and alternative app icons.
• Backup & sync — optional end-to-end encrypted cloud sync, a doctor-ready PDF/CSV report, and Face ID / PIN app lock.

PRIVATE BY DESIGN
Your health data is deeply personal, so it stays yours. Everything is encrypted and stored only on your device — never on our servers, never sold, never shared.

Beautifully crafted for iPhone and iPad, in 60+ languages.

Completely free — no ads, no subscriptions, no locked features. If Eluna makes your days easier, an optional tip in Settings supports development.

Begin your journey with Eluna today.