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
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, Ask eluna, reminders, the calendar, and basic stats.
eluna+ adds partner mode, deeper pattern insights once you have logged seven days, and extended history.
$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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