RhythmX: Period Tracker

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 18 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.