Comparison

Polymath 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

Polymath

This app makes learning math fun for kids by allowing them to unlock worlds and interact with characters as they improve their skills. It offers personalized learning paths and weekly progress reports for parents.

Highlights
  • Personalized math learning algorithm
  • Unlockable game worlds
  • In-world character interaction
  • Weekly parent progress reports
  • Adaptive learning pace
  • Builds math confidence
Read full description

Want to learn maths while having fun? Polymath is a fun world where kids love to practice maths! Kids can unlock worlds and talk to in-world characters as they level up their maths skills. Polymath is perfect for kids who excel at maths and those who struggle, Polymath builds confidence in every child. Polymath is the only maths app that teaches at the pace your child learns whilst also making maths fun. Here’s how Polymath is loved by kids around the world: - It’s personalised: our algorithm learns how your child learns and gives them the questions they’re ready to see, when they’re ready! - It’s fun and engaging: learning should be fun and maths can be too hard for too many kids, our mission is to change that! Polymath is also dedicated to our PARENTS! We believe parents are SO important when it comes to children’s education journeys. That’s why you'll get weekly reports on your child's learning where you can see how your child is progressing, and help support them. Help your child build a love of mathematics today! Read the terms of use here https://polymath.how/terms Read the privacy policy here https://polymath.how/privacy

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

Polymath4 screens
Night Zookeeper4 screens

Verdict

The call

The clearest difference is monetization model: Polymath at free with in-app purchases against Night Zookeeper's subscription. Polymath also leads on rating (5.0 vs 4.6) and review sentiment (100% vs 83%). Night Zookeeper's advantage is ads (none vs shown) and ratings volume (592 vs 2). On price, in-app purchases, device support 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. Polymath sells 1 in-app purchase, starting at $4.99 per month 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

Polymath holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Night Zookeeper has 592 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Polymath's written reviews are positive against 83% of Night Zookeeper's.

UpkeepUpdate frequency

Polymath ships an update every 4 months, Night Zookeeper every 2 months. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 4 level
Polymath versus Night Zookeeper: the parameters behind the verdict, then further details
ParameterPolymathNight Zookeeper
PriceFreeFree
Rating5.0 (2 ratings) — better4.6 (592 ratings)
Positive reviews100.0% of reviews — better82.8% of reviews
Number of ratings2592 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size29 MB378 MB
Age rating4+4+
DeveloperCeladon AI LimitedWonky Star

Customer experience

Polymath

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Night Zookeeper

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

Bugs and requests

Polymath

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

1 purchases

Polymath

Subscriptions1
  • Polymath+17 Days trial$4.991 Month
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 Polymath free?
Polymath 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, Polymath or Night Zookeeper?
Polymath is rated higher. Polymath averages 5.0 out of 5 from 2 ratings, while Night Zookeeper averages 4.6 from 592 ratings.
Do Polymath or Night Zookeeper have ads?
Polymath shows ads; Night Zookeeper does not.
Which is updated more often, Polymath or Night Zookeeper?
Polymath ships an update every 4 months, and Night Zookeeper every 2 months. Most recently, Polymath was updated on October 16, 2026 and Night Zookeeper on October 20, 2026.

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