The Wonder Weeks - Baby Leaps

In-app purchases
3.95K reviews
Content rating
Rated for 3+
500K+
Downloads
Content rating
Rated for 3+
Users Interact
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About this app

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.
Newborn milestones & Baby development leaps | Leap days tracker, schedule & tips
Updated on
Nov 4, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, Personal info and 4 others
  • This app may collect these data types
    Personal info, Photos and videos and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

3.94K reviews
Rebecca Wallace
November 4, 2026
I bought this app for support with my baby when my friend liked the book. I didn't always agree with the timeframe of the leaps but every baby is different. However I did like the suggestions of things to do with my newborn as wanted to support their development. Now it is a subscription app and what is offered is not worth it. Save your money.
Did you find this helpful?
The Wonder Weeks
November 4, 2026
Hi Rebecca! Good news: if you've already purchased the app, you don't have to pay again. Just contact us at [email protected] and we'll make sure you can continue using the app at no additional cost.
Ieva Myers
October 23, 2026
I downloaded this app when my baby was newborn and for a couple of months the app was somewhat helpful and exciting. when we got to 7 months, I didn't find it much help and when we got to 8 months, the app completely lost me with categorising dog breeds and recognising animal sounds. It's adding way too much anxiety to a busy life of mum as I started wondering what I am doing wrong because my baby doesn't seem to care if it's a cow, horse or a dog.
Did you find this helpful?
The Wonder Weeks
October 26, 2026
Hi Ieva, thanks for your feedback! Babies don’t always master skills during the leap they’re introduced in. They may explore them weeks later or during the next leap, which is completely normal. Every baby develops at their own pace. For more information, please contact [email protected].
Erin Byrne
October 2, 2026
used this app with all 4 of my babies, we had a late in life oopsie and I wanted to see whereabouts my 5th was in the leaps and I was disappointed to see that it's subscription based now, when it used to be free. I'll be uninstalling, very unfortunate.
Did you find this helpful?
The Wonder Weeks
October 19, 2026
Hi Erin! Good news: if you've already purchased the app, you don't have to pay again. Just contact us at [email protected] and we'll make sure you can continue using the app at no additional cost.

What’s new

We've made The Wonder Weeks even better!

• Dark mode: enjoy the app in a darker theme.
• Improved accessibility: the app is now more accessible and easier to use for everyone.
• Better performance: improvements for a smoother and more stable experience.

Enjoy the update!