The Wonder Weeks 4+

Understand why your baby cries

Domus Technica

Designed for iPad

    • £4.99
    • Offers In-App Purchases



The #1 baby app worldwide! Understand why & when your baby suddenly cries more than usual, is not themselves and… what you can do to help.

Your baby is suddenly crying all the time, clinging to you, and you ask yourself what is wrong. The good news is that this fussy crying phase is a sign of progress in the brain!

Millions of parents have gone before you in following, supporting, and encouraging the 10 leaps in the mental development of their baby or babies. It is with good reason that Apple has declared it to be in the top 10 of the “Best sold apps in 2018, 2019 & 2020”

- Learn all about the 10 mental leaps with tips, tricks & mind-blowing insights.
- Your unique personalized leap schedule shows when a leap starts and ends, and… it counts down for you.
- Discover how you can give your baby the help they need during the various stages of a leap.
- Know when you can expect new skills.
- Keep track of your baby’s development and milestones in the diary.
- Gain insight into your baby’s perception of the world.
- Experience the world through your baby’s eyes.

- Over 350 extra milestones to keep track of in your diary
- Baby monitor: Wi-Fi 4G (INCLUDING 7 chapters on sleep from the book)
- E-Book (in full or per chapter)
- Audiobook (in full or per chapter)
- Music to lull your baby to sleep (white noise & music)

- Declared by Apple to be in the top 10 “Best sold apps in 2018, 2019 & 2020”
- Most downloaded paid app in Health and Fitness
- Award for “Coolest App for Moms”
- “Choice & Gold” Award from users, MumIi
- AppRx Awards Top 10 “Children’s Health App”
- NHS (UK) – “Best App for Parents”

Especially for parenthood. The baby tracker for your baby’s leaps in their mental development. You can keep track of your baby’s milestones and your baby’s growth in our The Wonder Weeks baby tracker. A leap for you and your baby.


Disclaimer: This app has been developed with the greatest of care. However, neither the developer, nor the author is liable for any damage caused by inaccuracies or incompleteness of the app.

What’s New

Version 11.2.1

We have implemented several improvements and bug fixes based on your feedback. Thank you!

Ratings and Reviews

4.8 out of 5
35.2K Ratings

35.2K Ratings

R34d3rSmush ,

A pocket reassurance

I have found this app to be so helpful. In the early days - when I had no idea what I was doing - it was really reassuring to see that my bubs was being fussy because of a leap and they were bang on timing wise. I would wonder why he was being so different and check the app which would show us sitting right under a storm cloud.
I also really liked seeing what the current or next stages in development were. At first it helped us see what we could do to help his development and as he’s grown, we’ve found we are doing a lot of the things instinctively so it’s just reassuring. Anyway, I really liked having this app and would recommend it.


Based on unproven science from controversial academic. Don’t buy.

Personally I didn’t find that my baby’s development followed the leaps described in the app. It’s interesting to tick off the milestones such as when your baby makes consonant sounds etc but there is no scientific basis for the claims that all babies go through these leaps at the same time.

Extract from a 2018 guardian article by Oliver Burkeman:

The Wonder Weeks, a popular book by the Dutch husband-and-wife child development experts Frans Plooij and Hetty van de Rijt, insists upon the existence of 10 predictable “magic leaps forward” in your baby’s neurological development, heralded in each case by bouts of fussiness, raising the prospect that you might be able to tick them off like milestones in a home-renovation project. For example: at 46 weeks old, the authors declare, you can expect your baby to start to understand sequences, such as the steps involved in fitting one object into another. (Typically for the genre, The Wonder Weeks tries to reassure readers these stages will unfold naturally, while strongly hinting there are specific things parents must do to make them go well.) But it’s not wholly astonishing to learn, from Dutch press reports, that when one of Plooij’s PhD students sought experimental evidence for these leaps, she found none, and Plooij tried to block the publication of her results, triggering a controversy that saw him dismissed from his university post.

Katjlj89 ,

Had to delete due to the inaccuracy

So I’m a psychotherapist so I do have some knowledge of child development and at the very least how to accurately research information, the wonder weeks is absolute pseudo science based on theories which have been disproven.
I can’t believe the amount of people that fall for it when we absolutely know that you can’t accurately predict these things because children are individuals.
It’s also kind of scary that Dr Franz X Pooj theories have been challenged and disproven, and do not hold up to real studies about early child development, and yet is still unethically plugging this information everywhere and making money from it…
Baby development occurs on a continuum rather than a fixed schedule. Moreover, every child is different. Babies will develop their abilities at their own natural pace and rhythm based on myriad factors including their genetics, their diet, their environment, and the adults who interact with them. So, the milestone of rolling over might occur at 5 months, but that’s an average. It could also happen at 4 months, or 6 months. To suggest that babies will experience a mental leap that profoundly changes the perception of their world at distinct and precise intervals isn’t supported by the bulk of research into infant development.

App Privacy

The developer, Domus Technica, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Sensitive Info
  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More

More By This Developer

You Might Also Like

Health & Fitness
Health & Fitness
Health & Fitness