Cambridge researchers urge public health bodies like the NHS to provide trustworthy, research-driven alternatives to platforms driven by profit.

Women deserve better than to have their menstrual tracking data treated as consumer data - Prof Gina Neff

Smartphone apps that track menstrual cycles are a “gold mine” for consumer profiling, collecting information on everything from exercise, diet and medication to sexual preferences, hormone levels and contraception use.

This is according to a new report from the University of Cambridge’s Minderoo Centre for Technology and Democracy, which argues that the financial worth of this data is “vastly underestimated” by users who supply profit-driven companies with highly intimate details in a market lacking in regulation.

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.

They call for better governance of the booming ‘femtech’ industry to protect users when their data is sold at scale, arguing that apps must provide clear consent options rather than all-or-nothing data collection, and urge public health bodies to launch alternatives to commercial CTAs.

  • @mariusafa@lemmy.sdf.org
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    556 days ago

    I mean there are at least 2 apps for that in F-Droid. It’s just that most people are FOSS illiterate and only if a big corpo give them shit then they trust it.

    • @Hadriscus@jlai.lu
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      6 days ago

      I tried to talk to my wife about data ownership, opensource, etc. but it’s difficult to convey how important it is. She uses Flow. I’m trying to get her to at least try alternatives such as Drip

      • Autonomous User
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        6 days ago

        Not surprising, ‘open source’ is a deliberately ambiguous term, engineered to derailed libre software. First, clear up your own understanding, before telling others. Use simple words like control, scam and abuse. See this example. https://lemmy.world/post/21620691

    • Lka1988
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      6 days ago

      Not everyone uses Android devices.

      Edit: do you people not understand context? The person I replied to specifically mentioned F-Droid, which is ANDROID ONLY.

      • @NOT_RICK@lemmy.world
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        6 days ago

        Well on iOS there’s the Apple health app. To my knowledge it stores health data locally. I’ll double check now.

        Edit: it does store health data in iCloud by default, but according to Apple its end to end encrypted

        By default, iCloud automatically keeps your Health app data, including health records, up to date across your devices. To disable this feature, open iCloud settings and turn off Health. iCloud protects your health records data by encrypting it both in storage and during transmission. If you’re using iOS 12 or later and have turned on two-factor authentication for your Apple Account, health records are encrypted using end-to-end encryption through iCloud. This means only you can access this information, and only on devices where you’re signed in to iCloud. No one else, not even Apple, can access end-to-end encrypted information.

        • Autonomous User
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          6 days ago

          Wrong, Apple Health fails to include a libre software license text file. We do not control it, anti-libre software. Does Apple really think we are this easy to scam? It bans us from fixing backdoors. 🚩

          • @NOT_RICK@lemmy.world
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            56 days ago

            Yeah I know it’s not FOSS in the slightest, but it’s not a predatory app selling your health data to the highest bidder, presumably. I acknowledge that requires taking Apple’s word at face value though

          • Russ
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            16 days ago

            I mean, sure - but if you really don’t trust Apple to keep their word, then it wouldn’t matter if their Health app was FOSS or not. iOS itself is still (and probably forever will be) a closed source operating system. That gives them the power to do anything, including hijack the data from FOSS apps.

            • Autonomous User
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              6 days ago

              Replacing the system is easy when the apps don’t change, so start there.

        • Lka1988
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          16 days ago

          I’m aware, but the person I responded to specifically mentioned F-Droid, which is Android-only.

  • @pbg@sh.itjust.works
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    44 days ago

    flo app makes $192 million a year with 5 million paying users, which seems absolutely wild to me for something that covers such a basic need

  • @over_clox@lemmy.world
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    286 days ago

    I happen to be a penis owner.

    So what would happen if I were to install and use such a monthly tracker app and pretend I’ve been having regular monthlies for a while, then suddenly I miss a couple periods, then suddenly start having periods again?

    Would the cops come beating my door down claiming I had an abortion? 🤔

    Fuck this dystopian mass surveillance shit!

  • @kingorgg@feddit.uk
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    105 days ago

    Made my own desktop app in python (tkinter) which encrypts the data with GPG. It has predictions and potential ovulation days. The predictions seem pretty accurate so far.

  • @13igTyme@lemmy.world
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    166 days ago

    My wife just asks me to grab her boobs and I can generally let her know several days out and be accurate to within half a day.

  • Lukas Murch
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    136 days ago

    My wife used to use the tracker in fitbit (I think), but once US states started passing laws to track periods, she’s stopped using it. It’s the wild west in my house now.

  • mechoman444
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    86 days ago

    Yes of course but it’s marketing data.

    Marketing data. We need it for marketing to people so they can spend money.

    Don’t you understand! Marketing data!!!

  • @ayyy@sh.itjust.works
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    106 days ago

    If you have an iPhone just use the Apple Health app. It works great and the data is encrypted and never shared with anyone.

    • @vale@sh.itjust.works
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      46 days ago

      that was my initial thought too, but then I remembered that if may not be so obvious to those who aren’t like-minded like that. it’s still good to share with friends and family who might not know about it

  • LostXOR
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    46 days ago

    Do women need an app for this? Surely a piece of paper would work just as well, and have a 0% chance of selling your data.

    Edit: Yeah I deserve that.

    • ValiantDust
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      196 days ago

      Do people need an app for taking notes? Or a calendar?

      Sure, I used to do it on paper for many years. But it’s much more convenient to track it on my phone, which I have almost always with me. That way I can check whether I’m likely to be bleeding heavily before making plans with my friends to go swimming that day or on a long hike without access to a toilet.

      Also many women don’t just track the blood flow but also other data like temperature, cervix and cervical mucus. This helps calculate the most fertile days. It’s much easier to let an app do that.

      • Novaling
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        76 days ago

        Exacty, Drip features tracking for temperature, cervical mucus, the cervix, sex (solo or partner), desire, pain, and mood, along with spotting and your bleeding levels. It’s not just about “when will I have my period?” Additionally I love Drip because of the heads-up notif I get from them 3 days before my predicted period date. Also ut’s nice to have a computer calculate when my period will be and shows me if any were a little off or earlier than expected.

        Plus since it’s encrypted and local, law enforcement would have to crack that to find my period data. I could totally imagine law enforcement coming up with a bullshit warrant and breaking into someone’s home, and finding a calendar or notebook marked with their period data and being tried for it.

          • Novaling
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            56 days ago

            Yup! Pretty accurate too. Shows the day that it’s most likely to happen, and the two days around it are potential days. Gives you a notif about 5 days before it’s predicted to happen.

    • @Nima@leminal.space
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      146 days ago

      absolutely. you can also go back to sending hand written mail instead of using email or messaging apps too, but this is 2025 and software exists to help keep track of this.

      also apps exist that store local data only.

    • @andros_rex@lemmy.world
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      56 days ago

      The same could be said of to-do lists, right? But I still like having an app with a checklist, because my phone is always with me and a piece of paper is not.

      When I did have periods (thank god for testosterone), I had a really difficult time keeping track of them and they were often very irregular. The app I used helped me pick up patterns and would warn me when I needed to be prepped. My dysphoria cope was pretending that they didn’t happen ever, so it was helpful to have that occasional “hey, pack some pads today” as a notification without constantly checking a calendar.

  • @blitzen@lemmy.ml
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    26 days ago

    I legitimately have an idea for an app that solves this problem. Its key feature, besides being open source, would be that people without uteruses could use it too, making any data conceivably collected useless.

    I don’t have the skills to make it myself (yet), but if any developer wants to talk I’ll give the idea away. I just want it to be made.

    App would be open source, all data local. Perhaps the option to sync to encrypted iCloud or Android equivalent, but certainly not a cloud-based option you need a new login for. All the features currently in these kinds of apps and that make them useful for menstruating people. Now replace “period” with “hair cut”. Non-menstruating people can now use it, earnestly, for tracking when their last hair cut was, making it useful and the data (if it were to be collected somehow) just noise.

    I even have a name in mind: “hair**.**cuts” (heavy emphasis on the period in the name.) Idea is that anyone with it on their device has plausible deniability that they are using it for period tracking, but the “period” in the name is an implicit wink so we all know what it’s really being used for.