She doesn’t need you to fix it. She needs you to understand it.
I built PeriodBro, a period tracker for men, after realising I’d been a partner, a husband, a father — and I still didn’t understand the most basic thing about the women I loved. This app is what I wish I had years ago.
Every sign-up = one better relationship.
That’s why the first 1,000 users get PeriodBro completely free.
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No trial. No credit card. Just sign up and start.
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Latest Blog Posts
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Period Constipation: Why She Gets Backed Up Before Her Period (and How to Help)
Why constipation hits before her period, the progesterone-gut connection, what is normal, when to worry, and simple ways to help her feel better.
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Period Nausea: Why She Feels Sick to Her Stomach Around Her Period (and How to Help)
Period nausea is prostaglandins acting on her stomach, not a mood. Here’s the mechanism, what actually helps, and when it’s worth a doctor’s look.
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Period Diarrhea: Why Her Stomach Acts Up Around Her Period (and How to Help)
The same prostaglandins that cause cramps hit the gut, too. Why period diarrhea happens, how common it is, and how to quietly help without making it weird.
Built by a man who learned the hard way.
Thanks to PeriodBro, I now understand my girlfriend’s needs better and can support her emotionally and physically throughout her cycle. After my divorce, I started dating again. I noticed her moods shifted in a pattern — and I was always caught off guard. I started tracking manually in a notes app. Then I realised my daughter needed the same awareness from me. No app existed for this. So I built one.
This app truly helps me be there for my partner!
Devlet Butaev
Founder, PeriodBro
The Science Behind the App
Every feature in PeriodBro is grounded in peer-reviewed research. Not vibes. Not guesswork. Science.
The Four Seasons Are Real
What estrogen, progesterone, and LH actually do to her mood, energy, and desire — across 4 phases backed by 102 studies.
Read the research →Your Response Changes Everything
82% of men lack adequate menstrual knowledge. But knowledge alone doesn’t change behavior — here’s what does.
Read the research →The Dad She Can’t Talk To
0% of daughters would ask their father for menstrual help — even in close relationships. Research reveals why.
Read the research →No subscription required to get started.
Takes 2 minutes to set up. Might save you years of misunderstanding.