LunaCycle vs Luna

Every cycle tells a story. LunaCycle helps you read yours. Log your period, track symptoms, and get science-backed predictions -- all stored privately on your device, no account required. PERIOD & CYCLE TRACKING Log each period day with a single tap. LunaCycle automatically calculates your cycle length, predicts your next period, and shows you exactly where you are in your current cycle. FERTILITY WINDOW PREDICTIONS Know your fertile days before they arrive. LunaCycle uses your logged history to identify your ovulation day and fertile window, helping you plan with confidence -- whether you are trying to conceive or simply want to understand your body better. DAILY SYMPTOM LOG Record mood, flow intensity, physical symptoms, pain level, basal body temperature, water intake, and body weight. Every log builds a richer picture of your unique patterns over time. INSIGHTS & TRENDS Analyze your last 3, 6, or 12 months at a glance. See average cycle length, period duration, top symptoms, and BBT charts -- insights that help you spot changes and talk to your doctor with real data. CALENDAR VIEW A full monthly calendar shows period days, fertile windows, and ovulation markers at a glance. Tap any day for detailed phase information and logged symptoms. WHO IS LUNACYCLE FOR? LunaCycle is for anyone who wants a clear, honest view of their menstrual health -- whether tracking for the first time, planning a pregnancy, or monitoring patterns through perimenopause. Your data stays on your device. No cloud sync, no account, no data collection. LunaCycle works fully offline.

Luna is the period and fertility tracker that keeps your most personal health data exactly where it belongs — on your device. No accounts. No cloud sync. No data sharing. Just intelligent, private cycle tracking powered entirely by on-device machine learning. YOUR DATA NEVER LEAVES YOUR PHONE Luna was built from the ground up with privacy as the foundation. Every prediction, every insight, every log entry is processed and stored locally. We can't see your data because it never reaches us — not even anonymized. SMART PREDICTIONS, PRIVATELY POWERED Luna's on-device ML model learns your unique cycle patterns over time, delivering increasingly accurate predictions for: Period start and end dates Fertile windows and ovulation estimates PMS and symptom pattern recognition Cycle length trends and irregularities TRACK WHAT MATTERS TO YOU Daily symptom and mood logging Flow intensity and duration Basal body temperature (BBT) Cervical mucus and ovulation signs Intimacy and contraception notes DESIGNED FOR EVERY BODY Luna adapts to irregular cycles, post-hormonal transitions, perimenopause, and more. There's no "normal" cycle — Luna learns yours. BUILT FOR TRUST At a time when reproductive health data has never been more sensitive, Luna takes a firm stance: what happens on your phone stays on your phone. No account required to get started. No subscription needed to unlock your own data. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/