Lune Line Cycle Tracker vs RhythmX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lune Line Cycle Tracker
Easily log your menstrual cycle, receive updated predictions, and get gentle reminders to stay prepared. This private tracker helps reduce the monthly mental load. It is not a medical device and should not be used for contraception.
- Track period dates
- View cycle stage
- Predict upcoming periods
- Receive period reminders
- Optional PIN for privacy
- Browse period care essentials
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Lune Line is a private space for tracking your cycle and sharing what matters with people you trust. Log your period, follow updated predictions, and stay prepared with timely reminders. When you choose to connect with a partner, you can securely share your calendar, view calendars shared with you, and chat in one place. What you can do: • Track period dates • See your cycle day and estimated cycle stage • View predicted upcoming period dates that update as you log • Get reminders before your expected period and a check-in if you haven’t logged it • Share your calendar with people you choose • View calendars shared with you • Chat privately with connected partners • Manage sharing and access at any time • Add an optional PIN to protect access on your device Optional shop: • Browse period care, hygiene, comfort, and relationship products for individuals and couples Important: Lune Line provides tracking tools and cycle estimates. It does not provide medical advice and should not be used for contraception or pregnancy prevention. If you have health concerns, consult a qualified healthcare professional.
RhythmX
This app helps you understand your menstrual cycle with a focus on privacy and simplicity. It offers insights into your cycle phases, custom tracking, and educational content without collecting your personal data. All data is stored on your device, and the app is open source.
- Cycle phase insights
- Customizable symptom tracking
- Phase calendar view
- Educational phase information
- On-device data storage
- Open source code
- Optional period reminders
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RhythmX: Your Cycle, Your Rules Take control of your cycle with RhythmX, the menstrual tracker for people who value privacy and simplicity. Built by female engineers who know your body's data is yours, it gives you what you need to understand your cycle without the invasive data collection found in other trackers. Learn each phase in a straightforward way, with no fluff and no gimmicks. Whether you're tracking symptoms, moods, or ovulation, RhythmX helps you build a log that works for you. FEATURES THAT PUT YOU IN CONTROL • Insights: See your current phase at a glance, your average cycle and period length, and an estimate of your next period. Charts show phase timing, your tags, and cervical mucus patterns over time. • Phase Calendar: A month view tinted by phase, with a Today card and predicted period days. Tap any day to add or review tags and notes. • Custom Tags: Track what matters to you. Log symptoms, moods, energy, cravings, exercise, medication, and more, by phase, and edit or remove them any time. • Learn About Your Phases: Understand the science behind the menstrual, follicular, ovulation, and luteal phases, in plain language. • Past Cycles: Archive finished cycles, search your tags, and spot patterns or reflect on how far you've come. • Reminders: Optional notifications the day before and the day of your next predicted period. They are scheduled on your device and need no account. • Share on Your Terms: Export selected phases as a calendar (.ics) file, only when you choose to. • Light and Dark Mode: A calm blush palette in light, deep plum in dark, with a moon icon for each phase. • Accessible by Design: Dynamic Type up to accessibility sizes, VoiceOver labels, and Reduce Motion support. NO DATA COLLECTION, NO COMPROMISES Other apps profit from your most personal information. RhythmX collects nothing. What you log stays on your device. No account, no ads, no analytics, no tracking, and no network access. OPEN SOURCE RhythmX is open source. Contribute to its growth, or read the code to verify how your data is handled. Transparency is not optional. FOR WOMEN, BY WOMEN Designed by a team of female engineers who know what a menstrual tracker should do: protect your privacy, stay simple, and put you in charge. IMPORTANT RhythmX requires iOS 26 or later. Predictions are estimates based on your logged cycles. RhythmX is a tracking tool, not medical advice. Talk to a healthcare professional about health concerns. Because your cycle isn't just data. It's your life. IMPORTANT RhythmX requires iOS 26 or later. Predictions are estimates based on your logged cycles. RhythmX is a tracking tool, not medical advice. Talk to a healthcare professional about health concerns. LEGAL Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shapehaveninnovations.com/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Lune Line Cycle Tracker at none against RhythmX's 2. Lune Line Cycle Tracker also leads on update cadence (every 5 days vs fortnightly) and iOS requirement (15.1 vs 26.0). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. RhythmX sells 2 in-app purchases, starting at $1.99 per month. Lune Line Cycle Tracker asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Lune Line Cycle Tracker against 5.0 for RhythmX. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Lune Line Cycle Tracker ships an update every 5 days, RhythmX fortnightly. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.
| Parameter | Lune Line Cycle Tracker | RhythmX |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 75 MB | 7 MB |
| Age rating | 17+ | 12+ |
| Developer | Sexology Systems LLC | ShapeHaven Innovations LLC |
Customer experience
Lune Line Cycle Tracker
RhythmX
In-app purchases
Lune Line Cycle Tracker
No in-app purchases
RhythmX
- RhythmX Plus Monthly$1.991 Month
- PDF Day Pass$0.99









