Object still life — cotton, linen, morning light
Pregnancy mode
Switch Lunaia to pregnancy mode and it follows the weeks instead of the cycle. Your history stays where it is, and you can switch back.
Android and iOS · coming soon
Know your cycle — and keep it yours.
Lunaia tracks your period, ovulation and symptoms on your phone first. What you log stays on your device, syncs only to Lunaia’s own server in the EU, and is never sold.
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Today screen — 1170 × 2532
Every day
Log a day in a few taps
Tap today and one sheet opens. It explains the day at the top and edits it below — period, temperature, moods, symptoms. Looking is free: nothing changes until you touch a control.
Day sheet
Insights — your trends
Insights
See what your cycles have in common
Two full cycles in, your trends appear: cycle length, period length, waking temperature, moods over time. Every chart names the number it is about, and every cycle you have logged stays reachable as a record.
Energy tends to rise as your body prepares to ovulate.1
Claim slot: the hedge, the named source and the review date arrive from the app’s clinical pipeline.
Predictions
Estimates you can plan around
Lunaia estimates your next period and your fertile window from what you have logged, and the estimate tends to sharpen as it learns your pattern. Confidence is stated in words — high, medium or low — so a firm estimate never looks like a rough one.
Fertile-window estimates are not contraception. They are predictions based on your own logs, and they can shift as your cycles vary.
Hand holding a locked phone
App lock
A PIN, your fingerprint or your face keeps Lunaia closed to anyone holding your phone. Reminders are worded so a lock screen reveals nothing.
Your data
Your cycle lives on your phone
Most trackers start with a server. Lunaia starts with your device — and everything below is a property of the app, not a promise about the future.
Offline first
Everything you log is written to your phone and works with no connection at all.
One server, in the EU
If you turn sync on, it goes to Lunaia’s own server in the European Union. Nowhere else.
Never sold
Your health data is not sold, rented or handed to a third party. There is no business model that needs it.
Analytics you can switch off
Product analytics and crash reports are opt-out in the app, honoured before anything is sent, and neither carries what you logged.
Locked to you
A PIN and biometrics stand between the app and anyone else holding your phone.
Delete everything, in the app
One control removes your account and its data immediately. It lists what it will do before it does it.
Questions
Asked before you install
Does Lunaia work without a connection?
Yes. Lunaia writes what you log to your phone first, so tracking, your calendar and your trends all work with no connection. Sync is something you switch on, not something the app needs.
Can I use the fertile window as contraception?
No. The fertile window in Lunaia is an estimate drawn from what you have logged, and it can shift as your cycles vary. It is not a contraceptive method and should not be used as one.
What happens to my data if I delete my account?
Deleting your account removes your account and its data, and the app lists the consequences one per line before it happens. Signing out alone already removes your cycle data from that device.
Which languages does Lunaia speak?
English and Polish. The app follows your system language, and this site carries the same two.
Does this website track me?
No. There are no cookies, no analytics and no third-party scripts on these pages. The fonts are served from this domain, so no request leaves it to render the page you are reading.
Lunaia is coming to Android and iOS
Both listings are in preparation. Until they are live, the fastest way to hear about it is to write to us.
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