Open Nine Months and see the exact week, day and trimester, at a glance. Built for dads and partners who want to show up, not catch up.
Private. No subscription.
Sound familiar?
So what's the simplest way to actually know?
How it works
Built around the one question every dad-to-be asks himself - what week are we in?
Open the app and see the exact week, day, and trimester. No setup beyond your due date.
A full timeline, colour-coded by trimester, with key milestones already marked.
Pick any future date — the app instantly tells you the week and trimester.
Add a home or lock screen widget. The week is just there.
Nine Months does one thing well - and skips everything you'd never use. No symptom logs. No medical content. No subscription.
Open the app, see exactly where she is in the pregnancy. That's the whole interaction.
Know which trimester you're in and how far you've come - without doing the maths.
The entire pregnancy on one screen. Colour-coded trimesters and milestones already marked.
Pick any date - a trip, a wedding, a deadline - and instantly see what week she'll be in.
The current week, always visible. Glance at your phone, you're caught up.
No account. No sign-up. Your due date never leaves your iPhone.
Built different
Most pregnancy apps are built for the pregnant person - packed with symptom logs, medical content, and monthly subscriptions. Nine Months is the opposite.
Why I built this
When my partner was pregnant with our first child, I kept not knowing what week we were in. I'd ask her. She'd tell me. And sometimes I'd see in her eyes that she wished I already knew - not out of frustration, but because it was the pregnancy she was living every single day.
That look stuck with me.
I tried counting back from the due date. I tried mental notes. I tried Google. But pregnancy weeks are genuinely confusing - they start earlier than you expect, the trimesters don't map cleanly to the months, and the number just doesn't stick. And every app I found was built for her, not me. They were full of symptoms, medical content, and features I'd never touch.
So during that pregnancy, I built something simple on the side: one screen, the current week, the trimester, nothing else. Nine Months grew from there.
It's still that same idea. Open it and you know. No effort, no guessing, no asking again.
Julien
Founder of Nine Months
One price. Forever.
$4.99
Yes - Nine Months is built specifically for dads and partners, not for the pregnant person. It focuses on the one thing dads actually need: always knowing the current pregnancy week, day, and trimester at a glance. There are no symptom logs, no medical content, and no overwhelming features. Just open it and you're caught up.
Nine Months answers this question every time you open it. Enter your partner's due date once and the app instantly shows the current pregnancy week, day, and trimester - no counting back, no mental maths. Add a home or lock screen widget and you won't even need to open the app.
Nine Months is built for partners - dads, future dads, and anyone supporting someone through pregnancy. It focuses on what partners actually need: the current week, day, trimester, and progress. It is not a symptom tracker or a medical app for the pregnant person.
Not necessarily. Nine Months gives you three ways to get started: enter the due date if you know it, enter how many weeks along she is, or enter the first day of her last period. Whichever you have, the app calculates everything from there.
Nine Months is a one-time purchase of $4.99. You pay once and the app is yours forever - there is no subscription, no annual renewal, and no upsells. Every feature is included from day one.
Absolutely. Most pregnancy apps are built for the pregnant person and packed with content that isn't relevant for partners. Nine Months is designed to sit alongside whatever app your partner uses - it simply keeps you informed about the current week and trimester, without any overlap.
Most pregnancy apps are built for the person who is pregnant and packed with features. Nine Months does one thing well: it shows dads and partners the exact pregnancy week, day, and trimester at a glance, without symptom logs, medical advice, or clutter.
Nine Months is available on iPhone only. There is no Android version at this time.
Yes. All your data stays on your device. Nothing is sent to our servers and no account is required.
No. Nine Months works without an account. Set your due date and you are ready to go.
No. Nine Months is a one-time purchase of $4.99 on the App Store. Every feature is included with no subscription and no upsells.
Built for dads & partners
Stop asking. Stop guessing. Open the app and you're caught up - week by week, until your baby is here.
$4.99 · One-time · Yours forever