She doesn’t need you to fix it. She needs you to understand it.
I built PeriodBro 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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Why She Craves Chocolate Before Her Period: The Science
It’s not willpower. It’s magnesium, serotonin, and a luteal-phase reward-seeking dip. Here’s what’s actually happening — and how to be useful.
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How to Give Her Space Without Making Things Worse: A Partner’s Playbook
She asked for space and you don’t know what that means in practice. Here’s how to give it without disappearing, sulking, or making her job harder — and what’s actually happening in her nervous system while she’s away.
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Why Your Teenage Daughter Seems Moody (It’s Not You): A Dad’s Field Guide
Teenage daughters get moody. Most of the time it isn’t personal — it’s brain rewiring, irregular cycles, and a sleep clock that puberty moved. A dad’s field guide to what’s actually happening and what to do when the door slams.
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.