Private by architecture

The private period tracker that never sees your data.

A private period tracker keeps your cycle data on your device instead of a company server. mylune goes further than most apps: it has no account and no cloud, so your period, symptoms, and notes stay on your phone and are never uploaded, sold, or exposed in a breach.

Join the waitlist See how privacy works

What makes a period tracker actually private

Most apps call themselves private because of a policy they could change tomorrow. mylune is private because of how it is built.

It stays on your device

Your period dates, symptoms, moods, and notes are stored on your phone only. mylune has no server that holds your health data, so there is no central copy to leak, sell, or hand over.

It has no account

No email, no phone number, no sign-in. Nothing ties your cycle history to your identity, because there is no identity to attach it to.

It carries no trackers

mylune contains no analytics SDK, no advertising SDK, and no crash-reporting SDK. No Firebase, no Google Analytics, no Facebook SDK. There is nothing quietly reporting on you in the background.

It is verifiable

Privacy you cannot check is just a promise. mylune makes no outbound network request that carries health data, which anyone can confirm with a network proxy tool.

Cloud trackers versus mylune

Cloud period apps

Data synced to company servers
Account tied to your identity
Can be subpoenaed or breached
Often funded by ads or data

mylune

Data stays on your device
No account, no identity attached
Nothing on a server to subpoena
Free forever, funded by partnerships

Curious about the legal side of this? Read can your period tracker data be subpoenaed.

Private, and still a great tracker

Privacy does not mean fewer features. mylune predicts your period and ovulation window, tracks moods, sleep, and energy, and suggests phase-based self-care, all on your device. When you want to share, a Doctor Visit PDF export puts you in control of exactly what leaves your phone and when.

For moments when privacy needs to be physical, App Lock keeps mylune behind your device passcode and Stealth Mode disguises it as a calculator on your home screen. See the full feature list.

mylune is a wellness app for understanding your body, not a medical device.

Private period tracker questions

Do I need to create an account?

No. mylune requires no account, no email address, and no sign-in of any kind. You download the app and start tracking immediately.

Is mylune really free?

Yes. Core cycle tracking, daily health logging, insights, self-care suggestions, and all 18 languages are free with no hidden charges. There is no subscription in the current version.

Can I use mylune without giving my name or email?

Yes. mylune never asks for your name, email, phone number, or any identifying information. There is no identity attached to your health data.

Does mylune work offline?

Yes. mylune is fully offline. It requires no internet connection to log your period, track symptoms, view predictions, or use any feature. Everything runs on your device.

Can I verify that mylune keeps its privacy promise?

Yes. The app makes no outbound network requests carrying health data, which you can verify with a network proxy tool. We welcome independent security audits and will publish results when conducted.

Track everything. Share nothing.

Launching in the USA. One email on launch day, that is it.