Track your period privately — in your browser
Lunara is a private period and cycle tracker that runs entirely on your device. Log your period, symptoms and predictions without uploading a single byte.
Free · Works offline · Your data never leaves your device
No upload, by default
Your cycle data lives in your browser (IndexedDB). Nothing is sent anywhere.
Works offline
Log periods and view predictions with no internet connection at all.
Encrypted sync
Optional sync is end-to-end encrypted — even we cannot read your data.
Everything in one private place
Built for awareness — not a medical device, not a contraceptive.
Log periods & symptoms
Track flow, cramps, mood, sleep and more. Patterns emerge from your own history, not a template.
Predict your cycle
Next period, fertile window and ovulation estimates based on your averaged cycle length.
See the pattern
A clear calendar and timeline show where you are in your cycle today and what is coming.
Start in seconds
Open the tracker
No download, no account. It loads in your browser.
Log your period
Add the start date and flow. Add symptoms if you like.
See predictions
Lunara estimates your next period and fertile window instantly.
Frequently asked questions
Is Lunara really private?
Yes. By default Lunara stores your cycle data only in your browser using IndexedDB — nothing is uploaded. If you create an account and turn on sync, data is end-to-end encrypted on your device first, and the server only ever stores ciphertext it cannot decrypt.
Do I need an account?
No. You can track your period, symptoms and predictions fully offline with no account and no sign-up. An account is only needed if you want optional encrypted sync across devices.
Is Lunara a contraceptive or medical device?
No. Lunara is for educational and awareness purposes only. It is not a contraceptive and is not a substitute for medical advice. Always consult a qualified healthcare provider for decisions about your health.
Does it work offline?
Yes. Because everything runs in your browser and data is stored locally, you can log periods and view predictions with no internet connection at all.