Lunara vs Rhythmus

Lunara keeps your most personal health data exactly where it belongs — on your iPhone. No account, no cloud, no subscription. TRACK YOUR CYCLE, PRIVATELY Log your period, flow, symptoms, and mood in seconds. Lunara builds a picture of your unique cycle entirely on-device, never sending a byte to any server. BEAUTIFUL CYCLE WHEEL Your home screen shows exactly where you are in your cycle today — menstrual, follicular, ovulatory, or luteal — with a live-colored ring that changes with each phase. PREDICTIONS YOU CAN TRUST Unlock next-period and fertile-window estimates powered by your own history. Lunara learns from your cycles and shows confidence based on your consistency — not an algorithm built on strangers' data. LOG IN SECONDS Tap flow level, pick symptoms from curated favorites, done. Backfill any past day from the calendar without losing your history. HOME SCREEN WIDGET See your cycle day and days-to-period at a glance — right from your home screen. INSIGHTS & HISTORY Cycle-length chart, average, range, and streak — all calculated locally. Export as CSV anytime. BUILT FOR PRIVACY • All data stays on this iPhone • Optional Face ID lock • No account or email needed • No tracking, no ads, no subscription PAY ONCE, YOURS FOREVER Unlock predictions, insights, and export with a single $5.99 purchase. No recurring charges, ever. Lunara is a wellness companion. Estimates are based on your personal history and are not a substitute for medical advice or birth control.

Rhythmus is a period tracker with a cycle calendar — plus a nutrition and training plan that changes with your cycle. WHAT RHYTHMUS DOES • Cycle and period calendar: log your period, see your cycle day and phase at a glance, with estimated ovulation and fertile window • Nutrition plan: meals and nutrients matched to your current phase – omnivore, vegetarian, vegan – with a shopping list • Training plan: workouts scaled to your intensity and training days, logged set by set • Supplements: which nutrients matter in which phase • Daily energy check-in: feeling low, and the app suggests a gentler session • Weekly overview, symptom diary, cycle statistics from your own history WHO IT IS FOR For women who train and notice that the same session feels easy one week and impossible the next. Menstruation, follicular phase, ovulation and the luteal phase each ask for something different — Rhythmus takes that into account. NO ACCOUNT, NO TRACKING No sign-up, no registration, no ads, no subscriptions, no in-app purchases. Everything you enter stays on your device and is sent nowhere. The app works fully offline. From Settings you can export a backup at any time and restore it on another device. WITH SOURCES Every health statement in the app comes with a citation you can tap — straight to the study or fact sheet. Among others from the Journal of the International Society of Sports Nutrition, the Journal of Medical Internet Research and the National Institutes of Health. Available in German, English and Spanish. Rhythmus is a free passion project. Note: Rhythmus is not a medical device, not a contraception method, and does not replace medical advice.