Open source, privacy friendly menstruation tracking app. Your period, your data!
About this app
Bluemoon: Your Personal Period Companion Embark on a seamless journey through your menstrual cycle with Bluemoon, the open-source Menstruation/Period Tracker that prioritizes your privacy
• Privacy First: Rest easy knowing that your most intimate data stays where it belongs—securely on your device. Bluemoon is designed with privacy features out of the box, ensuring that your personal information remains confidential.
• Simple and Intuitive: Say goodbye to complicated interfaces! Bluemoon keeps it straightforward with easy-to-use features for tracking your periods and understanding your menstrual cycle. Effortlessly log your data and gain valuable insights at a glance.
Licensed under GPL-3.0-or-later, by Nils Grob.
What's New in v1.2.0
Imported from the F-Droid repository index.
- v1.2.0:
- - Added support for importing data from Clue
- - Added localization support
- - Translated app into Danish, Galician, Russian, Spanish
- - Translated app partially into German, Norwegian Nynorsk, Polish and Portuguese (Brazil)
Version history
Dec 13, 2025 · 18 MB · Android API 26–35 · code 9
Imported from the F-Droid repository index.
- v1.2.0:
- - Added support for importing data from Clue
- - Added localization support
- - Translated app into Danish, Galician, Russian, Spanish
- - Translated app partially into German, Norwegian Nynorsk, Polish and Portuguese (Brazil)
SHA-256 28f526f1e2e268662e1859c3a5f40c62d841f78dbe7720ac3effd80f6b43644c
Aug 10, 2025 · 17.9 MB · Android API 26–35 · code 8
Imported from the F-Droid repository index.
- v1.1.1:
- - Fixed an issue where the bottom app bar overlapped with the Android navigation bar
SHA-256 667f66e9d0c54b721f38d4e86d703710640f2a0b3d8eb4e7164f5626d5277f48
May 21, 2025 · 17.9 MB · Android API 26–35 · code 7
Imported from the F-Droid repository index.
- v1.1.0:
- - Added support for importing data from Flo
- - Fixed a bug that prevented period dates from being deleted
SHA-256 b98bd345f3e77058bc896edde543a9dfe35721bed9a07aaed93d19a1c7673b1c
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be ch.nilsgrob.android.bluemoon is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.1.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Bluemoon first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Bluemoon, and a listing is removed when the evidence for it stops holding up.
Get Bluemoon
Every source we list for ch.nilsgrob.android.bluemoon is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
28f526f1e2e268662e1859c3a5f40c62d841f78dbe7720ac3effd80f6b43644c
Signing certificate
97ae149940806ca0d6376a5b6f05a4f115a2236306273a28387cb9d3c751442f
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.