Luna vs Vela

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/

Vela helps you track perimenopause symptoms in seconds, notice patterns in your own data, and prepare for more focused conversations with your doctor. Perimenopause can feel confusing: sleep changes, mood shifts, hot flashes, fatigue, cycle changes, brain fog, and symptoms that come and go. Vela gives you a calm place to record what you notice and turn scattered days into a clearer personal summary. What you can do with Vela: • Log symptoms, mood, energy, sleep, triggers, notes, and period context • See your recent history and longer-term patterns • Prepare a doctor-ready summary for appointments • Track what changed without needing an account • Keep your health notes organized on your device Vela is designed for reflection and preparation, not diagnosis. Your logs can help you remember what happened, spot patterns you may want to discuss, and walk into appointments with a clearer picture of your experience. Vela Premium unlocks longer history, deeper insights, appointment prep, and doctor-ready report exports. Vela is not a medical device and does not provide medical advice, diagnosis, or treatment. Always speak with a qualified healthcare professional about symptoms, treatment decisions, or urgent concerns. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/