Comparison

The Wonder Weeks vs Oona

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

The Wonder Weeks

Understand your baby's developmental leaps and associated fussiness with this milestone tracker. It offers personalized schedules, insights into new skills, and playtime activities to support your baby's growth. Connect with other parents and access helpful parenting videos.

Highlights
  • Personalized leap schedule
  • Automatic leap notifications
  • Recognize leap signals
  • Discover new baby skills
  • 77 playtime games
  • Personal diary
  • Partner app linking
  • Parent forum
Features
Read full description

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 subscription 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.

About

Oona

Simplify sleep training with guided timers and progress tracking. This app offers step-by-step support, customizable plans, and visual charts to help parents manage their baby's sleep routines.

Highlights
  • Step-by-step sleep training support
  • Customizable sleep plans
  • Built-in timers for wait intervals
  • Progress tracking with visual charts
  • Detailed night logs and insights
  • Ferber method guidance
Features
Read full description

Sleep training can feel overwhelming, whether you are navigating bedtime, overnight wake-ups, or daytime naps. Oona brings clarity to the process with simple instructions, built-in timers, and detailed progress tracking. Whether you are following the Ferber method or one of its popular variations, Oona helps you manage each step of night and nap training with less guesswork, so you can focus on what matters most: helping your baby build healthy sleep habits. App Features at a Glance 1. Trainer Step-by-step support throughout every night and nap training session. • Track crying, sleep, wake-ups, and check-ins with a single tap • Follow clear, simple instructions at every stage • Use built-in timers to keep wait intervals and check-ins on track • Switch between night and nap training based on your baby’s schedule 2. Sleep Plans Choose or create separate plans for nighttime sleep and daytime naps. • Select from preset Ferber-style night and nap plans • Customize wait intervals and check-in durations • Create your own schedule from scratch • Save multiple plans as your baby’s sleep needs change 3. Journey See progress across nights and naps over time. • Visual charts show trends in falling asleep, crying, wake-ups, check-ins, and more • Review completed night and nap sessions in one timeline • Tap any session to view detailed sleep training data 4. Session Details Get a closer look at each night or nap training session. • View a visual timeline of every tracked event • Review crying time, sleep duration, wake-ups, and check-ins • Edit entries and add personal notes for additional context 5. FAQ Find clear guidance for both night and nap training. • Read trusted information based on the Ferber method • Learn how nighttime sleep training differs from nap training • Find easy-to-understand answers to common questions • Get guidance for challenging moments and less common situations

Screenshots

The Wonder Weeks4 screens
Oona4 screens

Verdict

The call

The Wonder Weeks and Oona both sit at 4.8 stars, but that hides the real split: 100% of Oona's written reviews are positive against 53% of The Wonder Weeks's. Oona also leads on in-app purchases (none vs 10) and ads (none vs shown). The Wonder Weeks's advantage is price (Free vs $1.99) and ratings volume (122K vs 23). On rating, chart position and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

The Wonder Weeks is free to download; Oona costs $1.99 up front. The Wonder Weeks sells 10 in-app purchases, starting at $1.99 per month. Oona asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for The Wonder Weeks against 4.9 for Oona. That said, the two scores are not equally well evidenced: The Wonder Weeks has 122K ratings behind it against 23, so its average is the more settled of the two. Written reviews are what separate them: 53% of The Wonder Weeks's written reviews are positive against 100% of Oona's.

UpkeepUpdate frequency

The Wonder Weeks ships an update fortnightly, Oona monthly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard8 real differences · 3 level
The Wonder Weeks versus Oona: the parameters behind the verdict, then further details
ParameterThe Wonder WeeksOona
PriceFree — better$1.99
Rating4.8 (122K ratings)4.9 (23 ratings) — better
Positive reviews53.0% of reviews100.0% of reviews — better
Number of ratings122K — better23
Update frequencyFortnightly — betterMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#86#82 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size94 MB36 MB
Age rating+44+
DeveloperDomus TechnicaThomas Pang

Customer experience

The Wonder Weeks

All ratings122,442 ratings
Positive96.5%
Neutral1.2%
Negative2.2%
Written reviews951 reviews
Positive53.0%
Neutral9.5%
Negative37.5%

Oona

All ratings22 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews16 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

The Wonder Weeks

Reported bugs

3 issues
  • Crashing and login issues
  • Syncing problems with calendar and data loss
  • Inconsistent behavior across app updates

Requested features

5 requests
  • Ability to adjust due date/birth date
  • More personalized content and tracking
  • Improved calendar and diary functionality
  • Community features to connect with other parents
  • Inclusion of all content without additional purchases

Oona

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

The Wonder Weeks

Subscriptions4
  • 1 Month Subscription$1.991 Month
  • 6 Month Subscription$4.996 Months
  • 1 Month subscription$4.991 Month
Show 1 more
  • 3 Months subscription$9.993 Months
One-time6
  • eBook - Chapter 1$0.99
  • eBook - Chapter 2$0.99
  • eBook - Chapter 3$0.99
Show 3 more
  • eBook - Chapter 4$0.99
  • eBook - Chapter 5$0.99
  • 24 Months subscription$34.99
None

Oona

No in-app purchases

Questions

Is The Wonder Weeks free?
The Wonder Weeks is free to download, with in-app purchases available.
Is Oona free?
Oona costs $1.99, with no in-app purchases.
Which has better reviews, The Wonder Weeks or Oona?
Oona is rated higher. The Wonder Weeks averages 4.8 out of 5 from 122K ratings, while Oona averages 4.9 from 23 ratings.
Do The Wonder Weeks or Oona have ads?
The Wonder Weeks shows ads; Oona does not.
Which is updated more often, The Wonder Weeks or Oona?
The Wonder Weeks ships an update fortnightly, and Oona monthly. Most recently, The Wonder Weeks was updated on November 6, 2026 and Oona on November 5, 2026.
Which is more popular, The Wonder Weeks or Oona?
The Wonder Weeks currently peaks at #86 in the App Store charts, and Oona at #82. Chart position reflects recent download velocity rather than total install base.

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