Some days you feel like a stranger in your own body. eluna reads what you logged and tells you what is going on, in a sentence, the way a friend would say it.
eluna is a period and cycle tracker that helps you feel understood.
We are a wife and husband. She dreamed up every part of eluna, I built it, and together we made the tracker we wished existed, one that helps you understand your body, and helps the person who loves you understand it too.
Most trackers mark days on a calendar. eluna learns your rhythm and uses AI to tell you what it means for your body, your mood, and your energy, one phase at a time.
What makes eluna different
Your daily insight is written from what you actually logged, not from generic phase advice. The whole app shifts color, tone, and guidance as your body moves through menstrual, follicular, ovulation, and luteal.
Your daily check in, in seconds
Log mood, energy, cramps, flow, bloating, headache, focus, skin, libido, and more. Then add a note by typing it or simply saying it out loud.
See your whole cycle
A clear, color coded calendar. Estimates for your next period, your fertile window, and ovulation. Irregular cycles are handled, so the math keeps up with your body.
Ask eluna anything
With eluna+, chat with a companion that already knows where you are in your cycle. Answers come in a sentence or two, never a lecture.
Move
A step goal that eases off on your low days and rises when you feel unstoppable. Start a walk and watch it live on your Lock Screen.
Care
A gentle check in after you move, food ideas that suit the phase you are in, and optional folic acid and vitamin D reminders.
Reflect
A private journal, typed or spoken, tagged to your phase. Journal entries stay on your device. They are never uploaded and never synced anywhere.
Belong
See how many women are moving through the same phase as you right now, and talk in a moderated community where every comment is screened before it appears.
For the two of you
Partner mode, part of eluna+, lets the person you love follow your cycle from their own device. You invite them with a code, you choose exactly which details they see, and you can pause their access whenever you want. No more explaining yourself on your hardest days.
On your wrist, on your Lock Screen
The Apple Watch app shows your phase and cycle day at a glance, and lets you log a period or track a walk without reaching for your phone. Lock Screen and Home Screen widgets keep today one glance away.
Apple Health
Connect Apple Health to import your period history and sharpen your predictions. Anything that comes from Apple Health stays on your device. It is never synced to the cloud and it never goes to the AI.
Private by design
eluna works fully without an account. Sign in only if you want cloud sync, partner mode, or the community. We never sell your data.
eluna+
The core app is free: daily logging, your daily insight, reminders, the calendar, Move, the journal, and the community.
eluna+ adds Ask eluna and partner mode.
$4.99 per month, $39.99 per year, or $99.99 once for lifetime access.
One purchase covers iPhone, iPad, Mac, and Apple Watch. The Mac app has no in app purchases.
Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings.
eluna is not a medical device and does not provide medical advice, diagnosis, or treatment. It is not a method of birth control. Predictions are estimates and they can be wrong. Please talk to a healthcare professional about anything you are unsure of.
Terms of use: https://elunaapp.com/terms-of-service
Privacy policy: https://elunaapp.com/privacy-policy
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Tap the Every Phase Challenge on the App Store and eluna now takes you straight to your badges.
In case you missed 2.4:
Ask eluna now gives you the exact date of your next period, every time you ask.
Your cycle calendar is easier to read: the phase names sit around the ring instead of on top of it.
Setup now shows the exact cycle length eluna works out from your dates.
On low energy days, your workout suggestions stay gentle.
The eluna+ screen now says exactly what it unlocks, Ask eluna and partner mode, and takes you straight to the one you chose.
Partner invite messages are clearer, and invite codes are harder to guess.
Settings explains plainly what stays on your phone and what goes to eluna's AI.
Your daily insight and check in questions are steadier on busy days.
eluna is a two-person labor of love with my wife .. the vision, the research, and every word are hers; i design, build, and ship it
Version 2.4.1
The developer, Abdul Rehman Haider, 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 Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Purchases
Contact Info
User Content
Identifiers
Sensitive Info
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Abdul Rehman Haider
Size
27.2 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.6 or later.
iPhone Requires iOS 17.6 or later.
iPad Requires iPadOS 17.6 or later.
Mac Requires macOS 14.6 or later.
Apple Watch Requires watchOS 11.0 or later.
Languages
English and 6 more
English, Dutch, French, Italian, Japanese, Simplified Chinese, Traditional Chinese