The pregnancy companion for both of you

Becoming Three follows your pregnancy week by week, with a full view for mom and a full view for her partner. It's free, with no account, no ads and no subscription. It works offline, and everything you enter stays on your device.

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Your pregnancy, week by week: the week 11 screen with a watercolor fig and baby development notesBuilt for both of you: choosing the expecting dad or partner view or the expecting mom viewTools for the home stretch: the contraction timer showing length and spacing for the last hourRemember how it felt: the daily mood check-in with watercolor faces

Built for both of you

Most pregnancy apps are written for mom alone, and partners are left to piece it together. Becoming Three gives each of you your own view of the same week.

Choose whether you're the expecting mom or the expecting dad or partner, and the app puts your content first. The other view is always one tap away, so you can see what the week looks like from each side.

Week by week, with watercolor art

Every week has its own watercolor illustration and a size comparison, along with a short, plain-language note on how the baby is developing. A weekly checklist keeps the practical side moving, from booking appointments to planning the nursery.

Tools for the home stretch

The last weeks bring a few jobs that are easier with the right tool in your pocket.

Remember how it felt

A quick mood check-in takes a few seconds, and a private journal holds the things you want to remember. Some days are great and some are hard, and both are worth writing down.

Private by design

There's no account to create and nothing to sign in to. Everything you enter stays on your device: Becoming Three has no servers that could hold it. If you want a copy, you can export a backup file yourself and import it again later.

After baby arrives

The app doesn't stop at the due date. Twelve newborn weeks carry on from birth, so you have the same week-by-week companion through those first months at home.

Works on any phone

Becoming Three runs in your phone's browser, so there's nothing to download from an app store. Open it, add it to your Home Screen, and it works like an app, including offline.

On iPhone, add Becoming Three to your Home Screen so Safari keeps your data.

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Pregnancy week by week · What to expect when your partner is pregnant · Becoming Three for dads and partners

Open the app