And on fdroid. It's fully offline AFAIK.

Yup, exactly. Nothing digital is truly safe. You want to properly avoid having your data secretly subpoenaed? Use a fucking journal or planner, and just mark your period days with a different colored pen, or put a raindrop in the corner and say it was days you personally predicted it to rain. Turns out, your tarot cards are just really bad at predicting the weather.

You could be open about it, and use it to track symptoms, calculate days between cycles, etc… But the more detailed you make it, the more obvious it will be if someone else gets ahold of it.

And make sure to lock it in a safe and burn it when you're done with it. Also don't share with your health Care provider without vetting them, and ensuring they aren't recording and disclosing your information. Or using AI. Good luck, essentially impossible to get good health Care for women, same as it ever was.

Your car has electronics, you should use a horse instead.

The reason is to get a notification it's coming. The reason is because I'm so fried surviving, I don't have the mental energy to spend on calculating the due date and then changing it by a day due to trends I'd also have to track. I barely remember to log it in an app, there's no way I'm logging it on a calendar, and then keeping track of that paper for multiple months or years to track trends. bleeding through my pants at work is worse to me than the spyware. Being a woman is hard enough. Blame the Spyware, not the women.

Or understand the difference between software that mines data and software that just does what it says. If it advertises cloud features, then it's probably a data mining app. There's firewall apps that make any other app need permission to use the internet at all that you can use as a gatekeeper, but then you need to adopt the mindset of wondering why an app wants internet access instead of just clicking "allow" so that things work asap.

But yeah, pen and paper or even a spreadsheet not dedicated to tracking periods are good options if you want to avoid worrying about all that. Only thing I'll add is that it applies to a lot more than just period tracking apps and IMO is as useful these days as knowing how to do basic car or home maintenance.

Private until apple gets a subpoena from a prosecutor in some medieval christo-fascist red state trying to turn a miscarriage into a murder charge.

The nefarious use of the data would be to track and convict women who "may" have had abortions dude.... Combined with telemetry data of when you may have had to travel to a blue state for a day or two and it's not a difficult pattern to spot

Mensinator is fantastic!

Not if your app is open-source, like from F-droid.

51 Permissions on Android.

This!

I moved to a paper planner for tracking my period and I’ve never had to worry about anyone stealing my data. Bullet journals or graph paper are far superior to any app.

Periods can vary in frequency, time, amount of flow, etc. Tracking when it starts and stops, PMS symptoms, and other data points can help to understand if/when something is wrong and give a better upstanding of our cycles. It also helps as we get older and move into the perimenopause and menopause parts of life.

I’ve been tracking my period in a paper planner for a few years now. This tracking helped me link my migraines to the birth control I was on. It has also helped me recognize PMS symptoms to the point where I usually know within a few hours of when my flow will start.

Not everyone gets a period on a consistent basis either. My cycle used to vary drastically from 2-3 times per year to multiple weeks of flow. Menstrual cycles are weird and can be confusing, tracking takes away some of that mystery.

They can vary wildly and it's very useful to keep a track on it

Health, I assume. If the period is irregular, something might be up. And also, when you're fucking, it's good to know if your period isn't late.

This might work OK for simple period tracking, but for more advanced fertility tracking, it's not really possible to do pen-and-paper without being a huge pain.

For example, the open-source, local-only app Drip optionally uses a "sympto-thermal method" to estimate when a user is fertile; the app takes not just the days they are on their period into account, but also their body temperature, cervical mucus values or cervix values, and throws those inputs into an open-source algorithm for much more accurate results.

Doing all that on pen and paper might be possible, but it would also be a bit of a nightmare.