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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Jealousy Before Her Period: What’s Hormonal and What Helps
Why jealousy before her period happens, what the research says about PMS and ovulation, what to say in the moment, and when it’s more than hormones.
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How to Explain Periods to a Child: An Age-by-Age Guide for Dads
How to explain periods to a child at every age, with simple words, answers to the questions kids actually ask, and why dads should join in.
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Implantation Bleeding vs Period: How to Tell the Difference
What implantation bleeding vs period bleeding usually looks like, why the timing overlaps, when a pregnancy test can answer it, and when to call a doctor.
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.