My wife needed a cycle tracker. Everything out there was either Flo (which got sued twice for sharing health data) or an abandoned GitHub project. So I built Ovumcy. Single Go binary, SQLite, Docker-ready. No analytics, no third-party APIs, no cloud. Your data stays on your server. Features: period tracking, symptom logging, predictions (ovulation, fertile window), statistics, CSV/JSON export, dark mode, Russian and English. Just pushed v0.2.5. Looking for feedback from real users.
A lot of cycle trackers right now sell that data and there is some concern it could be used to find women who have miscarried and charge them with a crime.
Something like your idea is safer for women to use.
How can that even be a thing? Miscarriages happen all the time
Well a miscarriage is basically an abortion and an abortion is basically a murder.
/s, to be clear, but some people will say that sincerely and in some parts of the world they get to write the law.
Yeah they have tried to prosecute women for miscarriages. Basically saying women cause them on purpose.
https://www.nbcnews.com/news/nbcblk/brittany-watts-miscarriage-bathroom-charged-rcna135861
The right wing conservatives often have these weird paradoxical beliefs. Like Mexicans are lazy but also stealing everyone’s jobs.
They believe women are designed to be baby incubators and are natural caregivers, but we are also naturally baby killers and have to be watched and kept from killing all the babies.
It’s ridiculous.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:
Fewer Letters More Letters DNS Domain Name Service/System HTTP Hypertext Transfer Protocol, the Web IP Internet Protocol LXC Linux Containers SSH Secure Shell for remote terminal access VPS Virtual Private Server (opposed to shared hosting)
6 acronyms in this thread; the most compressed thread commented on today has 9 acronyms.
[Thread #140 for this comm, first seen 7th Mar 2026, 01:40] [FAQ] [Full list] [Contact] [Source code]
I use Android, my wife - iOS. So many things that on F-Droid are simply unavailable to her (yes, I tried to convince her to go to our side). So I searched for living projects with self-hosting idea, did not find one and decided to create one. I have a CS background, though my professional work today is mostly in finance as a senior analyst where I write code to automate and optimize workflows. Ovumcy started as a personal project exploring a self-hosted approach to cycle tracking.
I use a period tracker to identify file extensions.
As a non-native speaker, I had to use LLM to get that joke)
My partner might volunteer to try it out, but since she is very regular it probably wouldn’t help much for input.
The main feature she says she misses from Flo (we are also data savy, so she left it), was for when things were irregular, the ability for it to predict the why’s and when’s like stress, etc.
In the current iteration, if something is irregular can you put in what happened and have it auto-adjust?
Also, reminder notifications a couple of days out were helpful.
I had been considering a project like this as well, but one that uses on-device analytics to record the why’s and when’s, then allowing for scrubbed anonymous submissions (date adjusting/etc like you do in a clinical trial) to allow for algorithm development while preserving privacy.
Happy to have a conversation about this for future potential PRs (I am an avid FOSS contributor in both planning and code, even working on a project for the Linux Foundation kernel dev team now).
Thanks, this is really useful feedback.
The reminder part is already on the roadmap, and I’ve now added two more issues based on your note about irregular cycles:
- #17 Add irregularity factor tags for cycle tracking
- #18 Use recorded cycle factors to improve prediction context
The direction I’d want for Ovumcy is less “the app predicts the why” and more:
- users can log things like stress, illness, travel, sleep disruption, etc.
- the app can use that to give better context and reliability hints for irregular cycles
- without pretending to make hard medical claims
The anonymous scrubbed-submission idea is interesting too, but I’d treat that as much later, because it changes the privacy/trust model a lot.
Happy to keep talking about it, and future PRs would definitely be welcome.
There definitely an actively developped open source privacy focused period tracker available, go check it out: https://gitlab.com/bloodyhealth/drip But all data stays local on your device , which is of course good from privacy pov but if you are looking for something accessible from different devices then this might not be suitable.
Thank you! I am aware of it, but mine is slightly diffrent approaches to the privacy, allowing to access from multiple devices.
Awesome! My wife just had her IUD removed and will probably start tracking again. Will get this set up for her and see if she likes it, will provide feedback if she has any.
Thank you, I opened Discussions for that, fell free to communicate.
This is super cool! I’m not afab so I can’t help test and my question may be ignorant but I’m curious why one would want this functionality to not be something native and benefits from being hosted at all?
There are some f-droid trackers that look nice (I keep seeing one there with a super pretty ui) but I’m not sure what the tradeoffs of just using a native application for something like this might be
The benefit over a purely local app is mainly cross-device access and easier syncing/backups, while still avoiding a third-party service storing your data.
Ownership of your data, privacy concerns, apps being tracked, cross-device, no f-droid for iOS.
Any chance that we can have this translated to Spanish?
Yes, will add soon. Thank you!
Spanish released
Thank you very much, now I can ask my wife test it out.
I did the same thing for my partner. She didn’t migrate in the end, and google killed my play store account.
https://bloodyhealth.gitlab.io/ - is also a good option.
Some kind of data import would be nice to have according to my partner, but it might be tricky with all the different apps.
I like the naming:) and is there any chance to restore access to your account? It looks like it might have a future.
That link isn’t mine, and it is available and active.
Mine is https://github.com/cameroncros/PrivatePeriodTracker
But it’s abandoned. Your welcome to steal anything you like from it.
Well, not stealing, being inspired)
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