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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1000
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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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When to Go to the ER for Period Pain: A Partner’s Checklist
The red flags that mean go to the ER for period pain, when a same-day call to her doctor is enough, and what a partner can do in the moment.
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Swimming on Your Period: What Dads Should Know for Teen Daughters
Can she swim on her period? What works in the pool, tampon timing, the myths teens hear, a swim bag kit, and how a dad can bring it up.
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Yeast Infection Before Period: Why It Happens and What Helps
Why yeast infections often show up in the week before her period, how to tell yeast from other causes, what helps, and when to see 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.