The Wonder Weeks worldwide bestselling baby app is a personalized weekly calendar of your baby’s mental development that will keep you informed about the leaps and bounds and the fussy phases of your baby.

• Awarded Coolest App for Moms
• Awarded by Apple as top 10 ‘Best of the year 2016’ in Australia, UK, Netherlands, and a great number of other countries.
• Consumer Choice & Gold Award by MumIi
• AppRx Awards Top 10 Children’s Health App
• NHS (UK) – Best App for parents listing.
• Best App Ever Wards 2013 & 2014 (Health & Fitness)
• Top 25 App in health & fitness is most countries around the world.

Keep track of your baby’s mental development
Learn all about the leaps and bounds and the fussy phases of your baby
Read the bestselling Wonder Weeks book here in this app
Take notes about a range of topics

Think of it as a portable, at-a-glance version of the calendar leap chart in The Wonder Weeks. Where the book describes in-depth and easy-to-understand terms the incredible developmental changes your baby goes through, the app is the perfect leap calendar companion to track your baby’s mental development (during the first 20 months).
By knowing what is going on inside the head of your baby, you can help him to make the leap more easily and stimulate his development.

The Wonder Weeks app helps new parents by:

- Calendar Showing when your baby makes a leap in his mental development

- What your baby can understand & learn after this mental leap

- What your baby can do after this leap

- What you can do to help your baby

This app is also a handy reminder for new parents when their baby’s brain is changing, or “leaping,” the baby is making a significant advance in mental development, and with each step forward comes a drastic change in the way your baby sees the world around him. Because these leaps come so quickly, the “new world” and new abilities can sometimes be scary, and the development can initially manifest in poor sleep, bad appetite, crying, clinging and crankiness – exhausting and frustrating mom and dad.

International experts on The Wonder Weeks:
 “This is a very practical and entertaining window into the baby’s first year and a half. van de Rijt and Plooij have observed and found the vulnerable times in an infant’s development that I independently came to in my book Touchpoints (Perseus Books Group). The authors’ observations and practical suggestions are wonderful.”
 -T. Berry Brazelton, M.D., professor emeritus, Harvard Medical School

"Anyone who deals with infants and young children will want to read The Wonder Weeks. This book will open parents' eyes to aspects of their children's growth, development, changing behavior, and emotional responsiveness that they might otherwise not notice or find puzzling and distressing."
 -Catherine Snow, Ph.D., Shattuck Professor of Education, Harvard Graduate School of Education

This App is developed with the greatest care. Neither the developer nor the author shall nevertheless be liable for any damages arising from any inaccuracies or omissions in this app.

What's New

Version 7.1

- New colors and style for Chart screen
- Leap numbers for All Leaps screen
- Other improvements
- Bugfixes

Ratings and Reviews

4.9 out of 5

2.9K Ratings

2.9K Ratings

Essential for every parent


I cannot recommend this app highly enough. We have used it since our daughter was born and she is now nearly 1. It's been invaluable! What makes it different is that it's based on due date so takes account of early and late births. It will tell you what your baby is learning and how much they understand of the world around them. This is essential as it accurately predicts periods of crankiness and clinging. Of course you can't change this but it means you can plan for it and give your baby some extra benefit of the doubt at that time. It's also great to know that there is an end to the current phase which can really stop you going crazy 😄

Developer Response


thank You for a truly great review of our app. I strongly believe that The Wonder Weeks app will keep up with your expectations in months to come.

All the best,

Every new mum needs this!

paisleys mum

The app every new mum should have! it’s such an amazing tool to have as a new mum knowing nothing about or even hearing of ‘leaps’ before. It gives you a run down of each leap, signs it’s happening, abilities gained during and ways to help comfort your little one.
With a calendar of when to expect the leaps it helps you realise babies arnt just being little monsters but are actually developing their little brains - highly recommend!

Developer Response


It's always nice to read a review like this one, where our users give a first-hand experience to all those interested in using the app. Thank You!

Best regards,

Hasn’t failed me yet


People will roll their eyes at me if I tell them about this app but honestly it has never steered me wrong. Only ever out by a day or so but always predicts when my little one is going to enter “diva mode”. It makes it a little easier to understand and, ultimately, deal with her fussy phases when there is reasoning behind it. I can appreciate her development so much more and help her along the way.


Domus Technica BV
57.1 MB
Health & Fitness
Requires iOS 9.3 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
You must be at least 17 years old to download this application.
Unrestricted Web Access
© The Wonder Weeks
In-App Purchases
  1. Chapter eBook, Leap 1 Free
  2. Chapter eBook, Leap 2 Free
  3. Chapter eBook, Leap 4 £0.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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