Privacy
Your period app is selling your data. Here’s the receipt.
Most popular period trackers share your cycle data with ad networks. We looked at what they actually send and who’s buying it.
Blog
Stuff worth reading
Health research, privacy deep-dives, and product updates from Mona.
Health
Your cycle probably isn’t 28 days. That’s normal.
The 28-day cycle is a textbook number, not a real one. Here’s what the research says about how much cycle length actually varies.
Product
Why Bleed is free and how donations keep it alive
Most apps charge you or sell your data. Bleed does neither. Here’s how the donation model works and where the money goes.
Health
That PMS rage? It might be PMDD.
Premenstrual dysphoric disorder affects 3–8% of people who menstruate. Most have never heard of it. Here’s what the research says.
Privacy
Period tracking after Roe: what actually keeps your data safe
Your health data can be subpoenaed. We break down which tracking methods are legally protected and which aren’t.
Privacy
How free period trackers actually make money
If you’re not paying, your cycle data is the product. We pulled the ad network documentation to show exactly how it works.