Most period-tracking apps are designed more to aid marketers and medical companies in collecting health data for ad targeting than for women
The golden age of menstrual surveillance is great for men, marketers, and medical companies. — A cartoon cloud told me I might be pregnant. Tweets: @kait_tiffany , @jamespmcleod , @nishachittal , @pragmatometer , @brittashipsit , and @taylorlorenz Tweets: Kaitlyn Tiffany / @kait_tiffany : i wrote about MENSTRUAL SURVEILLANCE. now i have push alerts for when my roommates are about to pms https://www.vox.com/... James / @jamespmcleod : Good lord, the lede of this article is like a tech horror story. (And ... wow ... the whole article is worth a read.) https://www.vox.com/... Nisha Chittal / @nishachittal : Period tracker apps aren't designed to help the women who use them. “They're designed for marketers, for men, for hypothetical unborn children, and perhaps weirdest of all, a kind of voluntary surveillance stance.” http://www.vox.com/... @pragmatometer : It's time to get the patriarchy out of our... *puts on blindfold* *opens VOGUE magazine to random page* *places finger on random words* ...menstruation trackers. http://twitter.com/... Britta Lundin / @brittashipsit : I use Clue and am generally happy with it, but yeah it is pretty frustrating to have fertility be the assumed use for the app. “Yet another example of technology telling queer, unpartnered, infertile, and/or women uninterested in procreating that they aren't even women.” http://twitter.com/... Taylor Lorenz / @taylorlorenz : Great @kait_tiffany piece on period tracking apps and how they're really designed for marketers and men. “When you look at these types of apps, they're completely about the surveillance of pregnant women” http://www.vox.com/...
Context & Ripple Effects
Kaitlyn Tiffany's Vox piece names the business model behind 'menstrual surveillance': period apps are engineered around the data they can sell to marketers and medical companies, not the women using them. It lands two months after reporting that Apple Health and Watch ignore pregnancy and other health conditions entirely, showing the gap runs both ways — consumer health tech either ignores women or monetizes them.
The article also reads as an early warning that aged well: within a year, [[a:945696|Privacy International found apps like MIA Fem and Maya shipping cycle timings, contraception use, and symptoms to Facebook]], and the WSJ documented sensitive health signals flowing through Facebook's analytics SDK. By 2022, after Roe's overturn turned that data into potential criminal evidence, Mozilla flagged 18 of the top 25 period and pregnancy apps — including Clue and Eve — for poor privacy practices.
First-order effects
- Women using mainstream period apps have their cycle data, symptoms, and pregnancy intent harvested for ad targeting by default — the product's primary customer is the advertiser, not the user.
Second-order effects
- Privacy researchers and journalists turn femtech into a recurring accountability beat, forcing named apps (MIA Fem, Maya, Clue, Eve, Stardust) into defensive disclosures while rivals race to market 'private' tracking as a differentiator.
Third-order effects
- Post-Roe legal exposure converts what was an ad-tech design choice into criminal-evidence risk, pushing the category toward local-only data storage and making privacy architecture, not feature count, the basis of competition in women's health apps.
The trend: Femtech is being forced from an extractive data-for-ads model toward privacy-first design, as researchers, regulators, and post-Dobbs legal risk reprice the value of menstrual data.