Comparison

Grammaropolis 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

Grammaropolis

This app makes learning grammar fun by personifying parts of speech as animated characters. Explore neighborhoods with songs, books, videos, and quizzes to master grammar concepts.

Highlights
  • Animated character-based lessons
  • Interactive curriculum maps
  • Songs, books, and videos
  • Quiz-based assessments
  • Progress tracking with badges
  • Covers all parts of speech
Features
Read full description

"The linguistic insights are pure gold." - Wired "Learning grammar has never been more fun!" - School Library Journal "Bright, cheerful, and very entertaining." - Tech & Learning **Featured in the Education App Store: Kickstart Your School Year 2013, 2014, 2015; What's Hot** Grammaropolis is where grammar lives! Hailed as a Schoolhouse Rock for the 21st Century, Grammaropolis uses the parts of speech as animated characters whose personalities are based on the roles they play in the sentence. From the shady pronoun always trying to take the noun’s place to the motherly conjunction who just wants everyone to get along, Grammaropolis achieves the seemingly impossible: we make learning grammar fun! Every part of speech has its own neighborhood that includes a curriculum map with songs, books, videos, and quizzes. Follow the map to earn your badge! The Complete Edition comes with the following neighborhoods: -Nouns -Verbs -Adjectives -Adverbs -Pronouns -Conjunctions -Prepositions -Interjections Our innovative, classroom-proven approach blends character-based content with traditional quiz-based assessment and is designed to address students' varied learning styles. Because the parts of speech are personified based on their roles in the sentence, the characterization provides students with a more effective way to visualize and internalize the roles of the parts of speech and to identify how a sentence is put together. Grammaropolis was created and refined in the ultimate proving grounds: the classroom. We participate in Apple's VPP for Educational Institutions.

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

Grammaropolis4 screens
Night Zookeeper4 screens

Verdict

The call

The clearest difference is price: Night Zookeeper at Free against Grammaropolis's $5.99. Night Zookeeper also leads on rating (4.6 vs 3.9) and ratings volume (609 vs 12). Grammaropolis's advantage is in-app purchases (none vs 12) and iOS requirement (13.0 vs 15.0). On ads 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

Night Zookeeper is free to download; Grammaropolis costs $5.99 up front. Night Zookeeper sells 12 in-app purchases, starting at $14.99 per month. Grammaropolis asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Night Zookeeper holds the better App Store score, 4.6 against 3.9. That said, the two scores are not equally well evidenced: Night Zookeeper has 609 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 73% of Grammaropolis's written reviews are positive against 83% of Night Zookeeper's.

UpkeepUpdate frequency

Grammaropolis ships an update every 6 months, Night Zookeeper every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard8 real differences · 2 level
Grammaropolis versus Night Zookeeper: the parameters behind the verdict, then further details
ParameterGrammaropolisNight Zookeeper
Price$5.99Free — better
Rating3.9 (12 ratings)4.6 (609 ratings) — better
Positive reviews72.7% of reviews82.8% of reviews — better
Number of ratings12609 — better
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size265 MB378 MB
Age rating4+4+
DeveloperGrammaropolis LLCWonky Star

Customer experience

Grammaropolis

All ratings12 ratings
Positive66.7%
Neutral8.3%
Negative25.0%
Written reviews11 reviews
Positive72.7%
Neutral0.0%
Negative27.3%

Night Zookeeper

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

Bugs and requests

Grammaropolis

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

None

Grammaropolis

No in-app purchases

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 Grammaropolis free?
Grammaropolis costs $5.99, with no in-app purchases.
Is Night Zookeeper free?
Night Zookeeper is free to download, with in-app purchases available.
Which has better reviews, Grammaropolis or Night Zookeeper?
Night Zookeeper is rated higher. Grammaropolis averages 3.9 out of 5 from 12 ratings, while Night Zookeeper averages 4.6 from 609 ratings.
Do Grammaropolis or Night Zookeeper have ads?
Neither Grammaropolis nor Night Zookeeper shows ads.
Which is updated more often, Grammaropolis or Night Zookeeper?
Grammaropolis ships an update every 6 months, and Night Zookeeper every 2 months. Most recently, Grammaropolis was updated on October 23, 2026 and Night Zookeeper on October 24, 2026.

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