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The Wonder Weeks - Baby leaps

by Domus Technica

  • Health & Fitness
  • Free
View on the App Store
Rating
4.8
122.3K ratings · US storefront
Top 30%among 117 Health & Fitness apps
Last update
Aug 13, 2026
Version 12.3.19
Size
279 MB
Category
Health & Fitness
Tracked since
Oct 9, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

The world’s No. 1 baby app! Understand why your baby cries more at certain times, isn't himself or herself and... what you can do to help.

During our research, which began in 1971 with Jane Goodall and the chimpanzees in Tanzania, we discovered that babies are more prone to cry and to be clingy or cranky from time to time. This behavior was shown to be related to a leap in the baby's mental development. More specifically, babies go through 10 mental leaps in the first 20 months of their life. A leap may be tough, but it's a positive thing: it gives your baby the opportunity to learn something new.

Use The Wonder Weeks app to:

  • See when a leap starts and ends thanks to a personalized leap schedule
  • Be automatically notified when a leap is about to start
  • Learn to recognize the leaps based on the various signals your baby gives
  • Discover the new skills your baby develops with each leap
  • Stimulate your baby's new skills with 77 playtime games
  • Keep track of your baby's development in your personal diary
  • Link the app to your partner's app to keep track of your baby's developments together
  • Share your experiences and ask questions in the forum
  • Watch fun and interesting videos about parenting
  • Complete fun polls and find out what other parents think about certain topics

Our mission is to help parents gain confidence in the face of the greatest leap in life: having a baby. We take a candid look at parenting, shed light on all sides and are there for all parents. We can all help each other and learn from each other.

Millions of parents before you have already followed, supported and stimulated the 10 leaps in the mental development of their babies. It's not a coincidence that we have been one of the best-selling baby apps worldwide for many years!

Disclaimer: This app has been developed with utmost care. Neither the developer nor the author is liable for any damage resulting from inaccuracies or omissions in this app.

What’s new

Release notes for the latest version, as written by the developer.

v12.3.19

We’ve made a few minor improvements and fixed some bugs for a better app experience.

Rank history

Daily position in the Netherlands charts. #1 is at the top.

Best rank
#12
Current rank
#14
Days charting
7 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

62/100

Not flagged as small & simple

  • Developer size70% · 25

    Developer: 2 apps on the charts

  • Audience size0% · 20

    Ratings: 122,323

  • App size25% · 10

    Size: 279 MB

  • Price model80% · 15

    Price model: free with in-app purchases

  • Demand proof100% · 30

    Best rank #3, 77 countries

An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2

How the score works

Version history

  • 12.3.19LatestReleased Aug 13, 2026