Dew vs Rhythmus

A period tracker that respects your privacy — by design. Your cycle lives on your phone and in your private iCloud. We can't see it. Neither can anyone else. No accounts, no logins — and nothing you log ever leaves your phone. WHAT MAKES IT DIFFERENT - On-device cycle predictions following FIGO 2018 medical guidelines - Lock Screen Live Activity — day-of and days-from your cycle, at a glance - Home Screen widgets in three sizes - Two-way Apple Health sync — one source of truth - Multi-profile support — track yourself and a partner, kept separate - Partner sharing via secure iCloud CALM BY DESIGN - No notification spam — at most one gentle nudge a day, suppressed on days you've already logged - No bright colors, no urgency, no exclamation marks - Dark and light mode, both done right PRIVACY, BY THE NUMBERS - Zero third-party trackers - Zero advertising SDKs - Zero crash-reporting middlemen — only Apple's own MetricKit - Anonymous, opt-out usage analytics — disable in Settings → Privacy For everyone tired of period apps that treat their body as a data set. Dew is free. The privacy promise is the product. — A note: Dew shows when your period is expected. It does not diagnose conditions or replace conversations with a doctor. Dew is general wellness — not a medical device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://trydew.app/privacy

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.