Mooneva Cycle: An Open-Source, Privacy-First Period Tracker
Your Cycle. Your Data. Your Device.
A free, open-source period tracker that can't see your data. It was built that way.
No account. No cloud. No ads. Everything encrypted on your phone with AES-GCM. The app doesn't even ask for internet permission.
Why We Built It Offline
Most period trackers upload your intimate health data to corporate servers. That data has been sold to advertisers, exposed in breaches, and legally demanded by law enforcement.
Mooneva has no servers. There is nothing to hack, nothing to sell, and nothing to hand over.
Data that never leaves your device cannot be leaked, sold, or subpoenaed.
| Cloud-Based Trackers | Mooneva Cycle |
|---|---|
| Data stored on company servers | Data stored only on your device |
| Vulnerable to breaches | No server exists to breach |
| Subject to legal subpoenas | No centralised data to subpoena |
| Requires account and personal info | No account, no registration |
| Company can analyse your data | We cannot see your data, ever |
See Your Cycle Clearly
Adaptive predictions that learn from your last three cycles. Period, fertile window, ovulation, and PMS on one calendar. Tap any day to log flow, mood, symptoms, discharge, sex, medications, and private notes.
Spot your patterns. Mood timelines, symptom heatmaps, and medication tracking show you what happens when, across every cycle. You can also add your own custom symptoms and moods.
Cycle regularity, flow patterns, and phase insights. See whether your cycles are regular, varying, or irregular, and your average flow shape over the last three periods.
🧪 Mooneva Lab
Track what goes in, not just what comes out.
Turn on Lab in Settings to get a dedicated tab that:
- Times your disc, cup, pad, or tampon so you never forget to change
- Reminds you before it's full, and again at 1, 3, and 6 hours overdue
- Estimates your blood loss per period, backed by published studies
- Mooneva Disc sizes are built-in presets: Small (30 mL) and Regular (60 mL), ready to go
The overdue timer stays on screen until you log a change or say you stopped. Lab data is included in your encrypted backups and hidden in discrete mode.
The Disc That Completes the Loop
You use the app to know your cycle. Lab times your product and tracks your flow. The disc is the missing piece.
Mooneva Menstrual Disc.
- Built for the app. Both sizes are presets in Mooneva Lab. Start the timer in one tap.
- High capacity. Regular holds 60 mL, designed for the heavy-flow days you already log.
- Sustainable. Replaces 3,000+ disposable pads and tampons.
- Swedish design. Medical-grade silicone, built for comfort.
App, Lab, Disc. One ecosystem, entirely yours.
Built for Everyone
Reproductive Health Modes
- Birth control mode: Hides fertility, tags bleeds as withdrawal bleeds. Works with pill, patch, ring, injection, IUD, and implant.
- Pregnancy mode: Log the start date, see which week you are in, and predictions pause automatically until your next period arrives.
- Kid Mode: Hides Sex & Libido tracking for a younger user.
- Show ovulation day: Marks ovulation without any fertility wording.
Privacy & Security
- Offline-first: No servers, no syncing, no internet permission.
- Bank-grade encryption: PBKDF2 key derivation with AES-GCM at rest.
- PIN lock with configurable auto-lock timeout.
- Discrete mode: Disguises the app as a task manager, including icon, name, interface, and notifications.
- Nuclear data wipe: Permanently delete everything in one tap.
Your Data, Portable
- Automatic encrypted backups. The app backs up by itself, once a day, only when data changes.
- Manual encrypted export. Password-protected, stored wherever you choose.
- Import from 4 apps: drip, Flo, Clue, and SimpleInnovation.
- Clinical PDF report: Generate a shareable report for your doctor in one tap, with date range selection.
14 Languages
English · German · Spanish · Swedish · Chinese · Persian · Arabic · Turkish · French · Ukrainian · Italian · Hungarian · Russian · Portuguese
Open Source
Full source code on GitHub under GPL-3.0. Available on iOS, Android, and F-Droid.
Frequently Asked Questions
Do I need to create an account?
No. No email, no registration, no personal information. Download and start tracking.
Where is my data stored?
Exclusively on your device. There are no Mooneva servers. If someone filed a legal request for user data, there would be nothing to hand over because we never had it.
Is Mooneva Cycle really free?
Yes. No ads, no subscriptions, no in-app purchases, no tracking. The source code is publicly auditable on GitHub.
What is Mooneva Lab?
An experimental feature (Settings, then Lab) that adds a timer for your menstrual product, reminders before it's full, and a per-period blood loss estimate based on published studies. Mooneva Disc sizes are built-in presets.
Can I use Mooneva Cycle during pregnancy?
Yes. Pregnancy mode logs the start date, shows which week you are in, pauses all predictions, and ends automatically when your next period arrives.
Can I back up my data?
Yes. The app can back up automatically once a day, or you can export an encrypted file manually. Both are password-protected.
Can I import data from another period tracker?
Yes. Mooneva Cycle imports from drip, Flo, Clue, and SimpleInnovation.
What languages does Mooneva Cycle support?
14 languages: English, German, Spanish, Swedish, Chinese, Persian, Arabic, Turkish, French, Ukrainian, Italian, Hungarian, Russian, and Portuguese.
Is Mooneva Cycle available on iPhone?
Yes. iOS, Android, and F-Droid.
Support the Project
We refused venture capital because they wanted your data. We refused advertisers because they wanted your attention.
Mooneva Cycle is 100% free, offline, and open source. To keep it that way, we rely on the people we protect.
The best way to support Mooneva? Buy the disc, the product that was designed alongside the app.
You can also:
- Rate us on Google Play or the App Store.
- Translate: Help us reach more languages.
- Share: Tell someone who cares about privacy.
Download Mooneva Cycle
Privacy Policy
Mooneva Cycle is built on one principle: your menstrual and reproductive health data belongs to you, and only you.
1. No Data Collection
We do not collect personal data. We do not use accounts. Your data never leaves your device unless you choose to export it yourself.
2. Local Storage Only
All health data is stored locally on your device using on-device encryption (PBKDF2 + AES-GCM). There are no cloud servers and no third-party syncing of any kind.
3. No Third-Party Tracking
We do not use analytics SDKs, advertising networks, telemetry tools, or crash reporting services that transmit data externally.
4. Your Rights
- Full deletion: Permanently wipe all your data at any time from within the app.
- Portability: Export your data to an encrypted backup file you control.
5. Security
- PIN lock: Prevent unauthorised access to the app.
- Encrypted backups: All exports are password-protected and encrypted.
- Device encryption: Data at rest is encrypted using PBKDF2 and AES-GCM standards.
6. Policy Updates
If this policy changes, you will be notified via an app update.
Your Body. Your Data. Your Device.
7. Contact
Questions about privacy? Reach us at app@mooneva.se
Mooneva Cycle, The Swedish Privacy Standard
Last updated: November 2026