Luna vs Period Tracker

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/

Period Tracker is a calm, private way to understand your cycle — built so your most personal data never leaves your phone. PRIVATE BY DESIGN • Everything you log is encrypted on your device. • No account. No sign-up. No cloud. • We can't read your data — not even us. • Delete everything in one tap, anytime. TRACK IN SECONDS • Log your period, flow, symptoms, and moods — your way. • Three logging styles: quick, step-by-step, or all-at-once. • A clean calendar shows your period, fertile window and ovulation. PREDICTIONS YOU CAN UNDERSTAND • See your next period with an honest confidence range — never false certainty. • Tap "why" to see exactly how a prediction was made. • Built to handle irregular cycles, PCOS and perimenopause without pretending every cycle is 28 days. INSIGHTS, ON YOUR DEVICE • Average cycle and period length, variability, and your recent cycles. • Spot your most common symptoms. • All computed locally — nothing is uploaded. GENTLE REMINDERS • Optional, on-device reminders before your period or to log your day. • Discreet by default — no cycle details on your lock screen. PEACE OF MIND • Optional Face ID / Touch ID app lock. • No ads, ever. Period Tracker is for tracking and education. It is not a medical device and does not provide medical advice or contraception guidance.