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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Cycle Tracking for Partners: The Complete Guide to Apps, Consent, and the Data That Actually Helps
Consent, accuracy, privacy and what to do with the data: the complete guide to cycle tracking for partners, with every deep dive linked.
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Teenage Acne and Periods: What Her Skin Is Doing, and What Not to Say
The bathroom light is on again and you have worked out that mentioning her skin is a bad idea. Here is what it is doing, how it tracks her cycle, and where you are actually useful.
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She Was Sent for a Pelvic Ultrasound: What Happens and What It Can Miss
The doctor said they would get her booked in for a scan, and nobody explained the rest. What happens in that room, what it finds, and why a clean report is not the end of it.
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.