Eluna Cycle: Period Tracker
Ovulation & Fertility Calendar
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
No subscription, no paywall, no account. Every feature is unlocked from launch, and your cycle stays encrypted on your phone.
No subscription. No ads. No paywall. No account. No server that could leak your cycle.
Eluna Cycle forecasts your period, ovulation and fertile window — and every forecast carries how confident it is, because a prediction that pretends to be certain isn't a prediction.
YOUR MOON RING
One ring shows the day of your cycle, the phase you're in and the countdown to what comes next, inside a halo that widens when the forecast is less sure. Around it, a daily note on your skin, energy, body, mood and libido for exactly where you are.
FORECASTS THAT SHOW THEIR WORK
• Period, ovulation day and peak, and a fertile window of up to six days
• An 80% confidence interval on ovulation instead of one falsely precise date
• Conception chance for today, in plain language
• Late-period detection that escalates gently and pauses forecasting rather than guessing
• Unusual cycles are detected and set aside, so one strange month doesn't drag your averages
• Accuracy climbs as you log — a Bayesian mod
TRYING TO CONCEIVE
Switch to Plan Pregnancy and log the biomarkers that actually move the forecast: basal body temperature in °C orLH test results, cervical mucus from dry throy tests.
LOG WHAT MATTERS TO YOU
Flow from spotting to heavy, cramps, mood, sleep, energy, skin and hair, headaches, sex and libido, medication, lifestyle. Notes up to 1000 characters a day.nd categories when ours don't fit.
SEE THE PATTERN
Flow dynamics, cycle consistency, a symptom heatmap across cycle days, mood distribution by phase, and your CPassport. When something keeps returning, Eluit with the clinical evidence class behind theexplanation.
PRIVATE IN A WAY YOU CAN VERIFY
• No account, ever. There is no Eluna server
• No ads, no analytics, no third-party trackers — nothing on your phone measures what you watch, tap or log
• Every health field is encrypted at rest on e database file
• PIN and Face ID lock, plus a cover that hides the app in the multitasking switcher
• Ghost Mode: notifications that reveal nothir medication
• Delete everything, irreversibly, in one tap
SYNC ONLY IF YOU WANT IT
Off by default. When you switch it on, your dhone with your own password before it leavesand lands in your own iCloud. Apple sees ciphertext. We see nothing, because there is nothing of yours for us to see.
FOR YOUR DOCTOR
Export a medical cycle report as PDF or CSV —of last period, cycle history, symptom trendsand your notes — password-protected if you want it to be.
REMINDERS THAT FIT Period forecast 1 to 3 days ahead, fertile wiedication and vitamin schedules (daily, lutealphase only, or a fixed course), and an evening nudge when the day is still unlogged.
PRICE, PLAINLY Free — and now completely ad-free. No subscriner. Everything is unlocked from the firstlaunch: every theme, all seven app icons, custom symptoms and categories, the clinical library, the doctor's report, encrypted sync. If Eluna has earned a place oe a small optional tip to support development — it unlocks nothing, it's simply a thank-you. That is the entire business model. Nothing about your own cycle is ever held behind a paywall.
Eluna Cycle is not a medical device and not aIt forecasts; it does not promise. Talk to aclinician about anything that matters.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
UNLOCKING YOUR ENCRYPTED BACKUP IS 78× FASTER
Deriving your sync key used to take almost thirty seconds. It now takes under four tenths of one.
DELETE EVERYTHING, IN ONE TAP
A single control wipes every record on the device, and optionally the encrypted copy in your cloud as well. Irreversible, by design.
BUILT FOR IPAD
A refreshed layout that uses the whole screen instead of stretching the phone one.
STEADIER FORECASTS
Unusual cycles are detected and set aside more reliably, so a single strange month no longer drags your averages with it.
Plus dozens of stability and performance fixes.
Thank you for being part of Eluna. Questions or ideas? Reach us any time from Settings.
The developer, Serhii Vakulenchyk, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Serhii Vakulenchyk
- Size
- 56.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 56 more
- English, Afrikaans, Amharic, Arabic, Bengali, Bulgarian, Burmese, Cambodian, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hausa, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Simplified Chinese, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, Zulu
- Age Rating
9+
- 9+
- Infrequent
Mature or Suggestive Themes
Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- Generous tip $9.99
- Snack $4.99
- Coffee $1.99
- Copyright
- © 2026 Serhii Vakulenchyk