Luteal
Private, offline-first cycle tracker separating facts from estimates
- Developer
- Joeri Kaiser
- License
- GPL-3.0-or-later
- Package
fr.luteal.app- Category
- Health Manager
- Latest version
- 1.8.0 · Oct 12, 2026
- Minimum Android
- Android 8.0
Screenshots
Description
Luteal is a private, offline-first menstrual cycle tracker that clearly separates recorded facts from calculated estimates.
Key features:
• Offline by default: Your data stays in a local database on your device with no account required.
• Honest tracking: Distinguishes recorded observations from statistical estimate ranges. No medical claims or automated diagnoses.
• Complete observation log: Record flow intensity, pain, mood, energy, physical symptoms, and private notes.
• Biomarker tracking: Log basal body temperature (Celsius and Fahrenheit) with disturbance tracking and thermal shift calculation.
• Cycle history and reports: Interactive calendar, longitudinal variability analysis, and clinician consultation summary export (PDF/HTML).
• Privacy and security: PIN and biometric app lock with screen masking.
• Duo companion: Private, granular partner sharing with end-to-end encrypted support requests and contextual guidance.
• Optional cloud sync: Optional end-to-end encrypted synchronization with self-hosted or community servers.
• No ads, analytics, or trackers: 100% free and open-source software (GPLv3).
Key features:
• Offline by default: Your data stays in a local database on your device with no account required.
• Honest tracking: Distinguishes recorded observations from statistical estimate ranges. No medical claims or automated diagnoses.
• Complete observation log: Record flow intensity, pain, mood, energy, physical symptoms, and private notes.
• Biomarker tracking: Log basal body temperature (Celsius and Fahrenheit) with disturbance tracking and thermal shift calculation.
• Cycle history and reports: Interactive calendar, longitudinal variability analysis, and clinician consultation summary export (PDF/HTML).
• Privacy and security: PIN and biometric app lock with screen masking.
• Duo companion: Private, granular partner sharing with end-to-end encrypted support requests and contextual guidance.
• Optional cloud sync: Optional end-to-end encrypted synchronization with self-hosted or community servers.
• No ads, analytics, or trackers: 100% free and open-source software (GPLv3).
All versions
| Version | Released | Minimum Android | Size |
|---|---|---|---|
| 1.8.0 | Oct 12, 2026 | Android 8.0 | 3.4 MB |
| 1.6.0 | Sep 17, 2026 | Android 8.0 | 3.4 MB |
| 1.5.0 | Sep 5, 2026 | Android 8.0 | 3.4 MB |
| 1.4.1 | Aug 31, 2026 | Android 8.0 | 3.4 MB |
| 1.4.0 | Aug 27, 2026 | Android 8.0 | 3.4 MB |
| 1.3.0 | Aug 26, 2026 | Android 8.0 | 3.3 MB |
| 1.2.1 | Aug 19, 2026 | Android 8.0 | 2.7 MB |
How to install an older version of an Android app · How to install an APK file on Android
From the developer (GitHub)
APK files published by the developer on GitHub. They are signed by the developer and may not install over the other builds on this page (different signature). Links open github.com.
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