Comparison

Kids' Words 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

Kids' Words

This educational game helps parents and teachers assess children's word recognition skills. It provides detailed report cards to track progress and identify areas of strength and weakness. The app features engaging themes, vibrant music, and sound effects to enhance the learning experience.

Highlights
  • Word recognition testing
  • Detailed report cards
  • Progress tracking
  • Multiple themes
  • Pronunciation guidance
  • Vibrant music and sounds
  • Supports multiple children and teachers
Features
Read full description

A first letters and sounds game for children ages 4 to 6. Your child hears a word out loud, then drags the beginning letter into place. You see which sounds they've got and which ones they're still working out. What your child does Pick a theme. A word is spoken. Five letters are scattered on screen and your child drags the right one to the front of the word. The word is spoken again once it's complete, so the sound and the letter connect. That beginning sound is what children learn first, before they can read or spell anything. It's also the part a four year old can get right on their own, which is what brings them back tomorrow. The wrong answers aren't random For alligator, all five choices are vowels. For mosquito they're m, s, v, b and p, the sounds children mix up with each other. Your child has to actually hear the difference, which is the whole point, and it's why the Progress screen tells you something real. Big words, small ask Your child only supplies the beginning, so the words don't have to be babyish. Crocodile, trampoline, grasshopper and watermelon are all in here. Children this age already know these words and love saying them. They just can't spell them yet, and with this game they don't need to. 150 words across 5 themes Jungle, Mountains, Backyard, Beach and Garden. Each theme has thirty words in three rounds of ten, so a round is short enough to finish before anyone loses interest. Every word is spoken by a real voice, and every word belongs to its theme. Record the words in your own voice Every word comes with a teacher's voice built in. Tap any word on the Word Lists screen, press Record, and say it. From then on your child hears you whenever that word comes up. Record all 150 or just the ones your child keeps missing. Say it the way your family says it, or let a grandparent record a theme. Play both voices back, choose for each word, and switch back to the teacher any time without losing your recording. Recording sits behind a parents' gate, so your child hears the voices but never reaches the microphone. Record a word once and every child on the device hears it. Add your own word lists Ten words make a list, the same length as a built-in round, and you can make as many as you like. Type them one per line or paste them in. Names from home, words from a favorite book, whatever your child is asking about. Each new word needs your voice, so record it once and the list is ready to play. Your list sits beside the built-in rounds in its theme, with its own Progress, and the wrong letters are still chosen to be plausible. A word you add always asks for its first letter, so your lists suit the youngest player. Made for children who can't read yet Every prompt is spoken. Nothing on screen needs an adult to read it aloud, so a four year old can open the app and play without help. See how they're doing Every round is saved to Progress. You'll see the words your child got, the ones they keep missing, and how that shifts week to week. Enough to know whether it's landing, without hovering over them while they play. A profile for every child Add as many children as you need. Each one keeps their own words and their own progress and picks up where they left off. Works for a family with three kids and a classroom with thirty. Nothing about your child leaves this app No accounts, no sign in, no ads, no trackers, no third party code of any kind. There's no server to send anything to. Your child's progress, your recordings and your word lists are saved on your device and stay there. The microphone is only on while you're recording. Tell us what's missing A word you wish we'd included, a theme your class would love, anything that isn't working. Send it to us at info@circular3d.com. We read all of it. Our soundtrack is on Apple Music. "The Jungle" and "The Jungle (With Animals)" are the ones people ask about. https://music.apple.com/us/album/kids-words-original-video-game-soundtrack/389220050

About

Night Zookeeper

This app makes reading and writing fun for children aged 6-12 with engaging games, video lessons, and skill challenges. It boosts confidence and improves spelling, grammar, and writing skills with personalized feedback from qualified tutors.

Highlights
  • Mini games and video lessons
  • Skill challenges covering English language arts
  • Personalized feedback from qualified tutors
  • Parent dashboard for progress tracking
  • Weekly writing competitions
  • 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

Kids' Words4 screens
Night Zookeeper4 screens

Verdict

The call

The clearest difference is price: Night Zookeeper at Free against Kids' Words's $0.99. Night Zookeeper also leads on update cadence (every 5 weeks vs every 26 months) and ratings volume (626 vs 5). Kids' Words's advantage is in-app purchases (none vs 10) and review sentiment (100% vs 78%). On rating, 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; Kids' Words costs $0.99 up front. Night Zookeeper sells 10 in-app purchases, starting at $14.99 per month. Kids' Words asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Night Zookeeper holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Night Zookeeper has 626 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 100% of Kids' Words's written reviews are positive against 78% of Night Zookeeper's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Kids' Words ships an update every 26 months, Night Zookeeper every 5 weeks. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

Scorecard7 real differences · 3 level
Kids' Words versus Night Zookeeper: the parameters behind the verdict, then further details
ParameterKids' WordsNight Zookeeper
Price$0.99Free — better
Rating4.4 (5 ratings)4.6 (626 ratings) — better
Positive reviews100.0% of reviews — better78.1% of reviews
Number of ratings5626 — better
Update frequencyEvery 26 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size39 MB393 MB
Age rating4+4+
DeveloperCircular3DWonky Star

Customer experience

Kids' Words

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Night Zookeeper

All ratings626 ratings
Positive90.7%
Neutral2.4%
Negative6.9%
Written reviews105 reviews
Positive78.1%
Neutral3.8%
Negative18.1%

Bugs and requests

Kids' Words

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

Kids' Words

No in-app purchases

10 purchases

Night Zookeeper

Subscriptions10
  • 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 7 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

Questions

Is Kids' Words free?
Kids' Words costs $0.99, with no in-app purchases.
Is Night Zookeeper free?
Night Zookeeper is free to download, with in-app purchases available.
Which has better reviews, Kids' Words or Night Zookeeper?
Night Zookeeper is rated higher. Kids' Words averages 4.4 out of 5 from 5 ratings, while Night Zookeeper averages 4.6 from 626 ratings.
Do Kids' Words or Night Zookeeper have ads?
Neither Kids' Words nor Night Zookeeper shows ads.
Which is updated more often, Kids' Words or Night Zookeeper?
Kids' Words ships an update every 26 months, and Night Zookeeper every 5 weeks. Most recently, Kids' Words was updated on November 1, 2026 and Night Zookeeper on November 8, 2026.

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