Mooneva Cycle: An Open-Source, Privacy-First Period Tracker
Your cycle data belongs to you. Not a company, not their servers, not anyone.
Mooneva Cycle is a free, open-source period and ovulation tracker built for one purpose: keeping your health data private. Everything is stored locally on your device, encrypted with AES-GCM, and never transmitted anywhere. There are no accounts, no cloud servers, and no analytics. The app doesn't even require an internet connection.
Why Offline-First Matters
Most period trackers upload your intimate health data to corporate servers. Data that has been sold to advertisers, exposed in breaches, and in some jurisdictions legally demanded by law enforcement. Mooneva Cycle is built on a different premise:
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 |
Features
Cycle Tracking & Predictions
- Adaptive predictions: Learns from your last three cycles for increasingly accurate period and ovulation estimates.
- Fertile window & ovulation: Clearly highlighted on your calendar.
- PMS alerts: Notification three days before your predicted period.
- Cycle regularity analysis: Understand your patterns over time through visual trends.
Daily Logging
- Flow intensity & symptoms: Including cramps, headaches, bloating, joint pain, fever, chills, and more.
- Mood tracking: Identify emotional patterns across cycles.
- Discharge tracking: Log type and consistency.
- Private notes: A secure personal journal, entirely on your device.
Reproductive Health Modes
- Birth control mode: Hides the fertile window and tags bleeds as withdrawal bleeds.
- Pill tracking: Log intake time daily, view adherence across each cycle in Trends.
- Pregnancy mode: Pause predictions and resume tracking when you're ready.
Privacy & Security
- Offline-first architecture: No servers, no syncing, no internet permission required.
- Local encryption: PBKDF2 key derivation with AES-GCM at rest.
- PIN lock: Configurable auto-lock timeout.
- Discrete mode: Disguises the app as a task manager (icon, name, and interface).
- Nuclear data wipe: Permanently delete everything with a single tap.
Insights & Reports
- Cycle history: View all past cycles at a glance.
- Symptom & mood heatmaps: See when symptoms typically appear across your cycle.
- Clinical PDF report: Generate a shareable report for your doctor in one tap.
Data Portability
- Encrypted backups: Export a password-protected backup file and store it wherever you choose.
- Import from other apps: Migrate your history from drip, Flo, or Clue.
Additional
- Dark theme
- Configurable first day of week: Monday, Sunday, or Saturday.
- 7 languages: English, Swedish, German, Spanish, French, Chinese (Simplified), and Farsi (Persian).
- Open source: Full source code available on GitHub under GPL-3.0.
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 Cycle 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.
Can I back up my data?
Yes. You can export an encrypted, password-protected backup file and store it wherever you choose.
Can I import data from another period tracker?
Yes. Mooneva Cycle can import cycle history from drip, Flo, and Clue.
What languages does Mooneva Cycle support?
English, Swedish, German, Spanish, French, Chinese (Simplified), and Farsi (Persian).
Is Mooneva Cycle available on iPhone?
Yes. Mooneva Cycle is available on iOS, Android, and F-Droid.
Open Source. Private Data. Supported by You.
We refused venture capital because they wanted your data. We refused advertisers because they wanted your attention. We chose you instead.
Mooneva Cycle is 100% free, offline, and open source. We do not sell your cycle history, we do not have servers, and we cannot read your encrypted backups. To keep this standard alive, we rely on the community we protect.
Upgrade Your Cycle
The most direct way to support Mooneva is to buy the product that completes the ecosystem.
Mooneva Menstrual Disc. You use the app to track your cycle. Now, manage it with the Mooneva Disc.
- Sustainable: Replaces 3,000+ single-use products.
- High capacity: Designed for the heavy-flow days you log in the app.
- Swedish design: Medical-grade silicone, built for comfort.
Shop the Disc & Support the App
Support Without Spending
Can't donate right now? You can still help us grow:
- Rate us: Leave a review on Google Play or the App Store.
- Translate: Help us localize Mooneva Cycle into your language.
- 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: July 2026