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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What Is Period Flu? Why She Feels Sick Before Her Period (And How to Help)
Period flu isn’t in her head. Hormone shifts and prostaglandins can leave her achy, feverish and wiped out. Here’s the science, and how to actually help.
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Why Is Her Period Late? A Partner’s Calm Guide to the Wait
Her period’s late and your stomach drops. Here’s what ‘late’ actually means, the common non-pregnancy reasons, and how to be the calm, steady partner through the wait.
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Period Terms for Dads: A No-Awkwardness Vocabulary List
A plain-English glossary of the period and cycle terms every dad should know – so you can talk to your daughter without fumbling the words.
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.