About Happy Husband
A daily, cycle-based briefing for partners — designed to be shared with the person it is about.
What Happy Husband is
Happy Husband sends you a short daily briefing based on where your partner is in her menstrual cycle. Each one covers the current cycle phase, what that phase commonly involves, and a few concrete things you might do that day.
It arrives by email. There is no app to install, for you or for her. Setup takes about thirty seconds: you enter the date her last cycle started, or ask her to, and the forecasts begin the next morning. The first week is free.
Who it is for
Partners of people who menstruate, who want to be more attentive and would rather have a nudge than rely on memory. Most of our users are men in long-term relationships.
It is not a medical device, a fertility tracker, or a diagnostic tool. It will not tell you whether someone is ovulating, pregnant, or unwell, and it should not be used to make decisions about contraception or health care.
How consent works
Happy Husband is built to be shared, not hidden. At the end of setup you are offered a one-tap invite that sends your partner a short, plain-language message explaining what you signed up for.
From that message she can see the same forecasts you receive, correct her own cycle dates, or opt out entirely — in which case we stop sending them. We do not build features that help anyone conceal this product from the person it is about, and we will not.
We ask you to send that invite because it is the right thing to do, and because it makes the product work better: she is the only person who actually knows when her cycle started.
What data it uses
About your partner we store three things: the date her last cycle started, her first name if you choose to enter one, and roughly how long the two of you have been together. Nothing else — no symptoms, no health history, no location.
About you we store your name, email address, and delivery preferences. Payments are handled by Stripe; card details never reach our servers.
Data lives in Google Cloud Firestore in the United States, encrypted at rest. We do not sell or share it. You can delete everything from settings at any time, and we delete accounts automatically 30 days after a subscription ends.
What it cannot do
Cycle-phase forecasting is an approximation, and we would rather say so here than bury it. We model a 28-day cycle; real cycles vary, and irregular ones drift out of sync quickly unless the start date is kept current.
The underlying research is also more mixed than most products in this category admit. A review of 47 prospective studies found that nearly 40% of them detected no association between mood and any cycle phase. Sensitivity to hormonal change varies enormously from person to person.
So treat a forecast as a prompt to pay attention, never as a fact about your partner. The person who knows how she feels is her.
Why I built this
Hi, I'm Sina Farzaneh, and I built HappyHusband.ai.
It started with a question my wife has asked me about a thousand times: “Why do I feel this way?”
She was having one of those days where she felt flat and unmotivated, with no obvious reason for it, and neither of us could explain it. This was around the time ChatGPT first took off, so out of curiosity I put together a rough mood forecast based on where she was in her cycle.
I thought it would be a fun experiment.
Two years later, it's the AI tool I use more than almost anything else.
It gave me a heads-up. Some idea of what she might be carrying that day, before I walked in the door. It changed how I timed conversations, when to push and when to leave it. The arguments that used to come out of nowhere mostly stopped coming out of nowhere.
Then something I didn't expect. My wife started asking me for it. A few times a week: “What's my forecast?”
That's when I stopped thinking of this as a tool for husbands. She wanted it for herself, to make sense of her own energy and mood. Period tracking apps already exist, but like a lot of women I know, she'd never used one consistently.
So it's built to be shared. You both see the same forecast, and nothing in it is hidden from her.
It won't predict anyone perfectly, and not every hard day comes down to a cycle. It's one more signal, and sometimes that's enough to help two people read each other a bit better.
I built this because it helped my marriage. I hope it helps yours.
Sina Farzaneh
Creator, HappyHusband.ai · LinkedIn
Contact
Questions, deletion requests, press, or feedback: support@happyhusband.ai. We read everything.