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Menstrual tracking app data is gold mine for advertisers that risks women safety

cam.ac.uk

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Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#121
post #87
post #61

Earlier quoted context omitted.

Simple + open source + no access to network + no updates (idk about Android/iOS cross-app data sharing).

Still data can be uploaded to the cloud and will be available to cloud providers. So there is more vectors to protect user data.

What's your threat model?

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#122

Earlier quoted context omitted.

Then you haven't tried looking. Women are being arrested and even convicted for having miscarriages, including in the US. https://www.bbc.com/news/world-us-canada-59214544 https://www.nbcnews.com/news/us-news/georgia-arrest-miscarri... https://churchandstate.org.uk/2015/01/conservative-dream-com... https://www.cnn.com/2025/06/06/health/miscarriage-criminal-c... https://www.themarshallproject.org/2025/04/02/law-pregna…

Every single of the six links you provided are about miscarriages and not abortions. Either I don’t understand something medical (not a doctor), or you’re mixing things to derail a conversation (dishonestly or unintentionally). Whether those miscarriages were natural or a result of human malice, is an absolutely separate discussion. How does all that prove an original point that an abortion can get a woman to prison?

This comment in this thread explains it fairly clearly. Do not make the mistake of thinking this is just a semantic difference.

https://news.ycombinator.com/item?id=44247822

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#123
post #99

They don't need apps to do this. I sat in a meeting with a data broker in 1998 where one of their managers was chuffed that they could determine menstrual cycles by analyzing purchasing records. And it wasn't hygiene products. Various foods and other spending patterns pop out after a 28-day correlation over groups of women that are artificially "synced" into cohort groups. This invasiveness will continue so long as t…

Joke's on them, my wife likes ice cream every day.

does she eat more ice-cream during menstruation or pregnancy? does she change flavors? there may be patterns that you are not aware of. only a steady ice-cream subscription would be able to hide that.

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#124

Earlier quoted context omitted.

why why why are you using a company device for such personal information? don't do this.

I don’t believe they mean storing it on a company owned device, just that Apple and Google are US companies

That's what I got out of isodev's comment too. The data is accessible by US companies still. If it comes down to being able to sell services and phones to the US market or giving up your data to a warrant I don't think Apple would stand on principal and lose US market access. [0]

[0] To clarify preemptively I mean if it came down to that in the end. I think Apple would attempt to fight it but if they lost in the Supreme Court and had to make the choice I think privacy would lose that fight.

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#125
post #46

If anyone is interested in a privacy focused tracking app that stores all your data locally, I make an app called Reflect [0] whose sole purpose is this, plus on-device analysis. We’re working on a menstrual tracking feature right now and it’s pretty far along. We’ve just released an anomaly detection feature as well. [0] https://apps.apple.com/us/app/reflect-track-anything/id64638...

[flagged]

Some disorders more or less require tracking to make them diagnosable and their symptoms managable (e.g. PMDD). Managing tracking with paper is ofc possible, but apps allow for reminders and gamification that help on challenging days.

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#126

Earlier quoted context omitted.

why why why are you using a company device for such personal information? don't do this.

I don’t believe they mean storing it on a company owned device, just that Apple and Google are US companies

maybe, but it reads like IT managed devices owned by your employer. i've never seen it referenced as "managed" when referring to the fact that iOS/Android are US companies. seems a strained way to phrase it

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#127

They don't need apps to do this. I sat in a meeting with a data broker in 1998 where one of their managers was chuffed that they could determine menstrual cycles by analyzing purchasing records. And it wasn't hygiene products. Various foods and other spending patterns pop out after a 28-day correlation over groups of women that are artificially "synced" into cohort groups. This invasiveness will continue so long as t…

Can you elaborate?

Because even with hygiene products, people buy them before they need them and stock up. And with food, you're often shopping for a week and for the whole family. You put things on a shopping list and don't buy them the same day you're using them, or even the same week.

I suspect that even if the manager thought they could determine it, their actual "results" were entirely random. After all, how is he going to check? Call two hundred of the women and ask? Also, periods are irregular. They're not a perfect 28 days each time. They vary month to month.

I don't doubt the manager thought he was doing that. I doubt it actually worked at all, though.

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#128
post #99

They don't need apps to do this. I sat in a meeting with a data broker in 1998 where one of their managers was chuffed that they could determine menstrual cycles by analyzing purchasing records. And it wasn't hygiene products. Various foods and other spending patterns pop out after a 28-day correlation over groups of women that are artificially "synced" into cohort groups. This invasiveness will continue so long as t…

Joke's on them, my wife likes ice cream every day.

[flagged]

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#129

Did I miss the part where the data risks women's safety? I was particularly interested in that part of the headline, but I didn't see it detailed in the article.

Third paragraph:

> The report’s authors caution that cycle tracking app (CTA) data in the wrong hands could result in risks to job prospects, workplace monitoring, health insurance discrimination and cyberstalking – and limit access to abortion.

Did you miss it or are you disagreeing with these being a threat?

Re: Menstrual tracking app data is gold mine for advertisers that risks women safety

#130

Did I miss the part where the data risks women's safety? I was particularly interested in that part of the headline, but I didn't see it detailed in the article.

the most obvious is that abortions are illegal in the US and you can monitor that status through the app.

So in extreme cases if you are pregnant and the baby is going to kill you, you aren't allowed to abort it - get an illegal abortion - woops the app spied on me and now you are in prison.

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