The Wonder Weeks

In-app purchases
48.2K reviews
Content rating
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About this app

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.

The payment will be deducted from your Google account on confirmation of your purchase. The subscription will be automatically renewed unless cancelled at least 24 hours before the end of the current period. The payment to renew your account will be deducted within 24 hours before the end of the current period. After your purchase, you can manage and cancel your subscriptions in your Google Play Store settings.

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.
Updated on
Jun 26, 2023

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.
No data shared with third parties
Learn more about how developers declare sharing
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

47.9K reviews
A Google user
April 15, 2020
Truly disappointed. The app came highly recommend, I'm only several minutes in and I want my money back. It jumps right in without a navigation intro so my initial use of the app is frustrating. The layout and the excessive wording is confusing. The heading shows my baby is in a leap but the paragraphs below only talk about the upcoming leap. The sections are not clearly labeled. I just wanted something simple and easy to reference; like bullet points on leaps or lists of what to expect.
97 people found this review helpful
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The Wonder Weeks
April 20, 2020
Chloe, we are always looking to improve the experience for our users, and appreciate the feedback. Please contact us directly at so we can further assist you. Best, Marco
Kate Scott
December 26, 2020
Still not happy with the app update/overhaul. Really miss the countdown to the next phase, whatever that phase may be. I understand the fussy phase countdown is back, but I really like seeing when the next thing is starting, no clue why this feature was removed. I'd also like an easier way to view upcoming skills list for future leaps, right now you have to start a diary entry to view, I just want to see what to look forward to. In the prior version you could more easily see this.
116 people found this review helpful
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The Wonder Weeks
January 5, 2021
Dear Kate, we really appreciate your suggestion. We will consider it and continue improving our app. However, please note that the countdown timer has been re-introduced, so please update to the latest version available at the Store. If you have further questions, please contact us at Best, Maria
A Google user
December 5, 2018
So dumb. Basically a poorly designed website turned into an app with super limited functionality. User response: that would explain why it looks and feels like a poorly designed website. It's a book! Really though, so hard to navigate. And you offer me a calendar, but the calendar is not interactive in the slightest. Was expecting to be able to click on the upcoming phase. Just super clunky all around. Makes more sense now that i know it was a book turned into an app, though.
284 people found this review helpful
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The Wonder Weeks
December 5, 2018
Hi Joshua, Actually the app is summarized from a bestseller book The Wonder Weeks, which has proven it's worth in the field of early child development. You are entitled to your opinion of course, but the value of the book, and the app, is significant. Regards, Marco

What's new

We have added a new feature that allows you to discover the leaps in an entirely new way with your child! For each leap we have added several games that you can do together with your child to help develop the matching skills.

In addition, we have added an animation for leap 1, to provide a brief explanation of what this leap is about.

Have fun with the app!