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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Latest Blog Posts
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How to Support Her Through Ovulation Pain
Ovulation pain, or mittelschmerz, shows up roughly two weeks before her period and confuses a lot of partners the first time. What it is, how to help in the moment, and the rare cases worth a doctor’s look.
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When to Have a Hard Conversation With Her (And When to Wait)
Timing a hard conversation right isn’t about finding the safe week on a calendar. It’s about reading whether she has the bandwidth today, backed by what the research on cycle phase and conflict actually shows.
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Ozempic and Her Period: What GLP-1 Drugs Actually Change
GLP-1 drugs like Ozempic and Zepbound can disrupt a lean cycle or restore ovulation in PCOS, and the two most common ones handle birth control pills differently. What partners should actually know.
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.