Period Partner
Expect
Energy bottoms out in the first two days, and blood loss takes iron with it. Day 2 flat is not day 2 unmotivated.
A cycle tracker for the partner
She tells you the date. The app tells you what helps.
You log the day she told you her period started. The app works out the phase and turns it into something useful to do this week.
We'll email you when iOS opens.
The whole mechanic
One date in. A week of knowing what to do.
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01
You log
He taps in the date she told him her period started. That is the only input there is.
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02
The app derives
It works out the phase and the next likely date, then turns that into what actually helps this week.
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03
She has no login
There is no account for her to make and no app for her to install.
What it can and cannot see
It never reads her phone. It only knows a date.
What it uses
- A date you typed in by hand
- The dates you logged before it
- A first name, so the app can address her
What it never touches
- Her phone, in any form
- Her location, messages or calendar
- Any sensor, wearable or health app
She is not the user. She does not create an account, and she cannot see what you store. Only keep it if she is fine with that.
- Her app
- None. Nothing to install.
- Daughter mode
- Hides fertility, ovulation, and libido content entirely.
- Deleting
- One tap removes the account and everything in it.
The content library
Twenty-five things worth knowing. Sorted by where she is.
Every tip is written for you, not for her — what to expect, what actually helps, and what to skip. This is the real library the app draws from.
Helps
Heat outperforms most painkillers for cramps. Put the hot water bottle within her reach before she has to ask you where it is.
Helps
Take one whole thing off her list without announcing it. Announcing it turns a favour into a debt.
Expect
Oestrogen is climbing, and energy, patience and mood climb with it. This is usually her best fortnight of the month.
Helps
Front-load the month. The trip, the difficult conversation, anything that needs both of you at full capacity lands best right now.
Helps
Say yes to whatever she proposes this week. She has more appetite for plans now than at any other point in the month.
Expect
Peak week. Energy, confidence and appetite for people are all at their highest.
Helps
Spend the good week on something. Dinner out, seeing people, the plan she has been looking forward to.
Expect
Confidence peaks here, which makes it the likeliest week for her to raise something she has been sitting on. If a real conversation starts now, it did not come from nowhere.
Expect
Progesterone drops in the week before her period and small things land twice as hard. If she is short with you, that is timing and chemistry rather than a verdict on you. Answer the point, not the tone.
Expect
Appetite up, energy slowly down, and less tolerance for noise and crowds.
Helps
Lower the bar for the week. Fewer plans, earlier nights, less admin. You are making the week cost her less.
What it does
Four things, and nothing else.
What helps, not just what's happening
Advice by phase — the app surfaces what's likely to help this week, not only the phase name.
One roster, more than one person
Track a partner and a daughter from the same account, and switch between them.
Daughter mode
Mark a profile as a daughter and fertility, ovulation, and libido content is suppressed everywhere.
Delete anytime
One tap removes the account and everything in it. No waiting period, nothing to cancel.
Coming soon to iOS.
We'll let you know the moment Period Partner is on the App Store.
iOS only, at launch. We'll email you when iOS opens.
Estimates, not medicine.
Every date here is an estimate worked out from the days you logged. Ovulation is worked backwards from the next predicted period, not assumed at day fourteen; cycle length is a median, so one odd month does not throw off the rest. It is still an estimate.
Period Partner is not contraception and it is not medical advice. It does not diagnose. Severe pain, bleeding beyond eight days, or three months without a period are all worth a doctor.