PHASES. Cycle Tracker & Diary vs Rhythmus
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
PHASES. Cycle Tracker & Diary
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A completely new perspective on your cycle and your everyday life. MORE THAN SYMPTOMS. Most cycle apps only let you track symptoms. PHASES goes further. Focus on what matters most in your everyday life. Not just symptoms, but also what you did and experienced. Sports, nutrition, date nights, family moments, relationship highs and lows, work stress, social events โ everything that matters to you. Clearly presented in a unique vertical calendar. FOR MEN, TOO. Why are cycle apps always made just for women? Enter your partner's period and alongside it your own life. Because HER cycle has an impact on YOUR relationship life when it comes to moods and libido. So you know what's going on โ for a better mutual understanding. DISCOVER PATTERNS you haven't seen before. When you keep everything in one place, connections become visible. How does your energy change around your ovulation, or your partner's? How do sleep, nutrition, and exercise relate to how you feel? PHASES makes these patterns visible so you can understand yourself better and plan smarter. PRIVACY BY DESIGN. Cycle apps that store data on servers are a no-go. PHASES stores everything exclusively on your device. No account required. No server. No tracking. No third parties. Your entries never leave your smartphone. FEATURES. - Unique vertical calendar - Fully customizable categories and entries - Track your period and receive a forecast - Bleeding isn't the same as your period. You can log both separately - Track ovulation, for example when you've confirmed it with an ovulation test or NFP - Log everything that matters to you: symptoms, mood, energy, sleep, sports, nutrition, social life, relationships and more - 100% on device. No cloud, no tracking - Core features usable without a subscription
Rhythmus
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Rhythmus is a period tracker with a cycle calendar โ plus a nutrition and training plan that changes with your cycle. WHAT RHYTHMUS DOES โข Cycle and period calendar: log your period, see your cycle day and phase at a glance, with estimated ovulation and fertile window โข Nutrition plan: meals and nutrients matched to your current phase โ omnivore, vegetarian, vegan โ with a shopping list โข Training plan: workouts scaled to your intensity and training days, logged set by set โข Supplements: which nutrients matter in which phase โข Daily energy check-in: feeling low, and the app suggests a gentler session โข 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 โ 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 โ 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.
Screenshots
Verdict
The clearest difference is update cadence: Rhythmus at daily against PHASES. Cycle Tracker & Diary's every 2 months. Rhythmus also leads on iOS requirement (15.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PHASES. Cycle Tracker & Diary ships an update every 2 months, Rhythmus daily. The most recent releases landed on September 24, 2026 and September 14, 2026 respectively.
| Parameter | PHASES. Cycle Tracker & Diary | Rhythmus |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Daily โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPod โ better |
| Requires iOS | 26.2 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 2 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | myNFP GmbH | Patrick Sarpen |
In-app purchases
PHASES. Cycle Tracker & Diary
No in-app purchases
Rhythmus
No in-app purchases
Questions
Is PHASES. Cycle Tracker & Diary free?
Is Rhythmus free?
Do PHASES. Cycle Tracker & Diary or Rhythmus have ads?
Which is updated more often, PHASES. Cycle Tracker & Diary or Rhythmus?
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