Comparison

Osmo Shape Builder vs Night Zookeeper

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

Head to head
About

Osmo Shape Builder

This app helps young children learn basic geometric shapes through interactive play. It progresses from identifying shapes to creating them, fostering a love for learning and turning screen time into an educational experience.

Highlights
  • Learn basic geometric shapes
  • Compose and create shapes
  • Identify and describe shapes
  • Color recognition
  • Hands-on learning system
  • Inspires love of learning
Read full description

Fill a magic mansion with furniture, items and incredible things! This game teaches basic geometric shapes in progression. Start with identifying and describing shapes, then advance to creating shapes on your own. LEARN ABOUT SHAPES Explore basic shapes concepts including composing shapes, relative positioning, and color recognition. INSPIRE THE LOVE OF LEARNING Designed for children ages 3-5 to inspire their love of learning through hands-on play. TURN SCREEN TIME INTO LEARNING TIME Osmo’s unique technology transforms your tablet into a hands-on learning system! *Requires the Osmo Base for iPad and Silicone Sticks & Rings. Each sold separately or as part of Osmo Little Genius Starter Kit. Learn more by visiting www.playosmo.com. *Please see our device compatibility list here: https://support.playosmo.com/hc/articles/115010156067 ABOUT OSMO -- 21ST CENTURY PLAY AND LEARNING Osmo uses the screen to create a new healthy, hands-on learning experience that promotes creativity, problem-solving and social interaction. We do this with our reflective artificial intelligence technology.

About

Night Zookeeper

This app makes reading and writing fun for children aged 6-12. It offers mini-games, video lessons, and skill challenges covering a full English language arts curriculum. Children receive personalized feedback from tutors and earn rewards, while parents can track progress.

Highlights
  • Interactive mini-games
  • Video lessons
  • Skill challenges
  • Tutor feedback on writing
  • Parent progress tracking
  • Motivating rewards
  • Collaborative writing opportunities
Features
Read full description

The multi-award winning Night Zookeeper makes reading & writing fantastically fun and easy for 6-12 year olds. It’s trusted by thousands of parents around the world to improve their children’s spelling, grammar, reading & writing skills and really boost their confidence. The app has exciting mini games, video lessons, and skill challenges, created by educational experts and covering an entire english language arts curriculum. Children can play independently, and at their own pace, earning exciting and motivating rewards along the way. Tips from characters and inspiring prompts then help your child to write pieces of writing which our qualified tutors then read and give encouraging feedback on. This feedback can be viewed in your parent dashboard, where you can also track your child’s progress and achievements, and receive monthly printable resources. Alongside the thousands of learning activities and tutor feedback, a Night Zookeeper subscription provides your child with monthly awards, weekly writing competitions, and opportunities for collaborative writing in a safe, moderated environment. Night Zookeeper is: FUN: There are thousands of exciting and engaging activities for Grades 1 to 6. TRUSTED: An award winning program, used by thousands of families. Rated 4.7 on Trustpilot from 500+ reviews. COMPREHENSIVE: The program covers a full language arts curriculum of reading, writing, spelling, grammar & punctuation, that rewards children as they progress. SELF-PACED: Children can play independently and work through the program at their own pace. PERSONALIZED: Children get written feedback from our team of tutors on their pieces of writing- so you don't need to be the bad guy! SAFE: No in-app ads or purchases. TRACKABLE: A parent dashboard helps you to easily track your child's progress. OFFLINE & ONLINE: Free monthly printable resources are sent straight to your inbox. Users must log in with their account details to access Night Zookeeper. "There is nothing quite like Night Zookeeper, and I wish I had started them on it sooner!" Tim & Jennifer, parents "My kids were always frustrated with writing and reading, now they are excited each day and have started writing full stories." Justin, parent “My kids are loving this program and writing more than they ever have before. The game format and reward system holds their attention, and their creative juices keep flowing" Paul, parent Technical details: * Internet connection required Recommended: Latest iPad, Latest iPad Pro, Latest iPad Air, Latest iPad mini, Latest iOS Subscription options: The first 7 days of a subscription are free. Subscriptions renew automatically; your App Store account will be charged unless you cancel at least 24 hours before the end of the current period. Cancel anytime in your App Store account settings. Privacy Policy: https://www.nightzookeeper.com/privacy-policy Terms & Conditions: https://www.nightzookeeper.com/terms-and-conditions Start a FREE trial of Night Zookeeper today!

Screenshots

Night Zookeeper4 screens

Verdict

The call

The clearest difference is review sentiment: Night Zookeeper at 83% against Osmo Shape Builder's 0%. Night Zookeeper also leads on rating (4.6 vs 2.3) and update cadence (every 2 months vs every 3 months). Osmo Shape Builder's advantage is monetization model (free with in-app purchases vs subscription). On price, ads, in-app purchases and iOS requirement 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

Both are free to download. Osmo Shape Builder sells 2 one-off in-app purchases and Night Zookeeper sells 12 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Night Zookeeper holds the better App Store score, 4.6 against 2.3. That said, the two scores are not equally well evidenced: Night Zookeeper has 592 ratings behind it against 86, so its average is the more settled of the two. Written reviews point the same way: 0% of Osmo Shape Builder's written reviews are positive against 83% of Night Zookeeper's.

UpkeepUpdate frequency

Osmo Shape Builder ships an update every 3 months, Night Zookeeper every 2 months. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
Osmo Shape Builder versus Night Zookeeper: the parameters behind the verdict, then further details
ParameterOsmo Shape BuilderNight Zookeeper
PriceFreeFree
Rating2.3 (86 ratings)4.6 (592 ratings) — better
Positive reviews0.0% of reviews82.8% of reviews — better
Number of ratings86592 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPadiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size322 MB378 MB
Age rating4+4+
DeveloperTangible PlayWonky Star

Customer experience

Osmo Shape Builder

All ratings86 ratings
Positive30.2%
Neutral3.5%
Negative66.3%
Written reviews28 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Night Zookeeper

All ratings592 ratings
Positive90.5%
Neutral2.2%
Negative7.3%
Written reviews93 reviews
Positive82.8%
Neutral2.2%
Negative15.1%

Bugs and requests

Osmo Shape Builder

Not enough reviews yet to summarise bugs or requests.

Night Zookeeper

Reported bugs

3 issues
  • Freezing and crashing issues
  • Upside-down screen when creating new characters
  • Audio not working consistently

Requested features

3 requests
  • Dark mode option
  • Compatibility improvements for older devices
  • More content for older age groups

In-app purchases

2 purchases

Osmo Shape Builder

One-time2
  • 3-day trial of Shape BuilderFree
  • Unlock Shape Builder$24.99
12 purchases

Night Zookeeper

Subscriptions12
  • NZK 1 Month - 1 License7 Days trial$14.991 Month
  • 1 Month - 2 Licenses7 Days trial$17.991 Month
  • NZK 1 Month - 3 Licenses7 Days trial$17.991 Month
Show 9 more
  • 1 Month - 4 Licenses7 Days trial$21.991 Month
  • 3 Months - 1 License7 Days trial$36.993 Months
  • 3 Months - 2 Licenses7 Days trial$49.993 Months
  • 3 Months - 3 Licenses7 Days trial$49.993 Months
  • Yearly - 1 License7 Days trial$118.991 Year
  • Yearly - 2 Licenses7 Days trial$154.991 Year
  • Yearly - 3 Licenses7 Days trial$154.991 Year
  • Yearly - 4 Licenses7 Days trial$189.991 Year
  • Yearly - 5 Licenses7 Days trial$239.991 Year

Questions

Is Osmo Shape Builder free?
Osmo Shape Builder is free to download, with in-app purchases available.
Is Night Zookeeper free?
Night Zookeeper is free to download, with in-app purchases available.
Which has better reviews, Osmo Shape Builder or Night Zookeeper?
Night Zookeeper is rated higher. Osmo Shape Builder averages 2.3 out of 5 from 86 ratings, while Night Zookeeper averages 4.6 from 592 ratings.
Do Osmo Shape Builder or Night Zookeeper have ads?
Neither Osmo Shape Builder nor Night Zookeeper shows ads.
Which is updated more often, Osmo Shape Builder or Night Zookeeper?
Osmo Shape Builder ships an update every 3 months, and Night Zookeeper every 2 months. Most recently, Osmo Shape Builder was updated on October 9, 2026 and Night Zookeeper on October 11, 2026.

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