Fully offline,
by design.
Lunella requests no network access at all it physically can't connect to the internet. You can verify it yourself in your app permissions.
Period & cycle tracking · fully offline
Your cycle,
Your cycle,
beautifully private.
A modern period and cycle tracker that keeps everything on your device. No internet. No accounts. No tracking.
On-device & encrypted
No internet permission
One-time purchase
What's inside
Everything you need.
Everything you need.
Nothing you don't.
Thoughtful tracking that respects your privacy at every step designed to work entirely on your phone.
Fully offline,
Private by design
All your data is encrypted and stored only on your device, protected by a PIN you set. Nothing is ever uploaded.
Cycle & period tracking
Predictions, a clear calendar, and daily logs for symptoms and moods your patterns at a glance.
Fertility insights
Qualitative fertile-window and ovulation estimates. Estimates only not medical advice or birth control.
One-time purchase
Pay once and it's yours. No subscriptions, no ads, and no in-app purchases.
Optional private reminders
Local notifications, off by default. Turn them on and they stay on your device with neutral text.
Insights & trends
See your average cycle and period length, how much your cycle varies, and your most common symptoms and moods all from your own history.
Encrypted backups
Export a backup locked with a passphrase only you know (Argon2id + AES-256). Move it to a new phone or your own storage without the passphrase it's unreadable, even to us.
Locks itself, stays hidden
A PIN guards every launch, the app locks when you switch away, and its contents stay hidden in the app switcher and from screenshots.
Available in 7 languages — English · Français · Italiano · Deutsch · Español · Português · Türkçe
A closer look
Designed to feel calm and clear.
Every screen is built for quick, private logging and a beautiful overview of your cycle.
The calendar
See your whole month at a glance.
Period days, your fertile window, and predicted dates laid out clearly so you always know where you are in your cycle.
- Color-coded period and fertile days
- Predictions that learn from your logs on your device
- Tap any day to see or add details
Fertility insights
Know your fertile window.
Calendar-method estimates of your fertile window and ovulation, shown simply as Low, Medium, or High always with a clear reminder that it's an estimate, not medical advice or birth control.
- Estimated fertile window & ovulation day
- Qualitative likelihood never a pregnancy percentage
- Always shown with disclaimers not contraception
The Lunella promise
What happens on your phone, stays on your phone.
No data collection. No servers. No analytics. No ads. No accounts. Your most personal information never leaves your device because it never needs to.
No data collection
No servers
No analytics
No ads
No accounts
Questions
Good to know
Yes. Lunella works fully offline and stores everything on your device, encrypted and protected by a PIN you set. The app has no internet permission, so your data physically can't be sent anywhere.
No. Lunella is a one-time purchase. There are no subscriptions, no ads, and no in-app purchases.
No. Everything runs locally on your phone. The app doesn't request network access, so it works perfectly with no connection.
No. Fertile-window and ovulation insights are estimates to help you understand your cycle. They are not medical advice and not a form of contraception. For health decisions, please consult a qualified professional.
Lunella is available in English, French, Italian, German, Spanish, Portuguese, and Turkish.
Legal
Privacy Policy
Lunella is built to be private by design. We collect no personal data. All cycle and health information you enter stays encrypted on your device and is never transmitted anywhere. The app has no internet permission.
Information we collect
None. Lunella does not collect personal data. The cycle, period, symptom, and mood information you log is stored only on your device. It is never sent to us or to any third party.
No tracking or advertising
Lunella contains no analytics, no advertising, and no third-party tracking SDKs. There are no accounts and no sign-in.
Permissions
By default, the app requests no permissions. Only if you choose to enable reminders does the app use the notification permission to show local, on-device reminders. No data leaves your device for this, and the reminder text defaults to a neutral message.
How your data is stored
Your data is stored encrypted on the device and protected by a PIN you set. Because the app has no internet permission, your information cannot be uploaded or backed up to any server by Lunella.
Purchases
Lunella is a one-time paid app with no in-app purchases or subscriptions. Payment is handled by Google Play. The app itself does not process or receive your payment information.
Children
The app is not directed to children under 13.
Data deletion
Since your data lives only on your device, uninstalling the app or clearing its data removes it. Nothing is held on any server.
Changes to this policy
We may update this policy from time to time. When we do, the effective date above will be updated here.
Contact
Questions about privacy? Email us at info@lunella.app.
Your cycle, in your hands.
Private, offline, and beautifully simple. Download Lunella and keep your data where it belongs with you.
One-time purchase · No subscriptions · No ads