# Sudoku School! vs Night Zookeeper

The clearest difference is monetization model: Sudoku School! at free with in-app purchases against Night Zookeeper's subscription. Sudoku School! also leads on iOS requirement (9.0 vs 15.0). Night Zookeeper's advantage is update cadence (every 2 months vs every 7 months) and rating (4.6 vs 4.4). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Sudoku School! 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.

Night Zookeeper holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 431 and 616 respectively. Written reviews complicate that: 85% of Sudoku School!'s written reviews are positive against 83% of Night Zookeeper's, so the app with the better star average is not the one people write more warmly about.

Sudoku School! ships an update every 7 months, Night Zookeeper every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Sudoku School! | Night Zookeeper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (431 ratings)](https://appshunter.io/ios/app/sudoku-school/id441158805/reviews) | **[4.6 (616 ratings)](https://appshunter.io/ios/app/night-zookeeper-fun-learning/id6504489937/reviews)** |
| Number of ratings | 431 | **616** |
| Positive reviews | **85.1% of reviews** | 83.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 25 MB | 378 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sarah Pierce](https://appshunter.io/developer/406813189) | [Wonky Star](https://appshunter.io/developer/573502316) |

## What reviewers say

### Sudoku School!

[App page](https://appshunter.io/ios/app/sudoku-school/id441158805)

This app teaches children and beginners how to play Sudoku with simplified 4x4 and 6x6 puzzles. It offers in-game help, colored tiles for easier recognition, and ten difficulty levels to accommodate growing skills. Multiple user accounts and a trophy system encourage progress.

**Highlights:** 4x4 and 6x6 Sudoku puzzles, In-game rule explanations, Colored tiles for beginners, Ten difficulty levels, Multiple user accounts, Trophy wall for progress

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4x4 puzzle pack | $0.99 | one-time |
| 6x6 puzzle pack | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to learn
- 🤩 Fun and addictive
- 🧠 Helps develop logic skills
- 🎨 Colorful and visually appealing
- 👨‍👧‍👦 Great for kids and beginners

**What reviewers complain about**

- 💰 Limited free content, need to pay to unlock more
- 🔒 Locked levels restrict full access
- 🙄 Only 2 free puzzles per difficulty level

**Reported bugs**

- Tiles sometimes lock up and can't be moved
- No win acknowledgment after completing puzzles

**Requested features**

- Unlock all levels for free
- Provide more free puzzles
- Add daily free puzzle challenges


### Night Zookeeper

[App page](https://appshunter.io/ios/app/night-zookeeper-fun-learning/id6504489937)

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:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NZK 1 Month - 1 License | $14.99 | per month |
| 1 Month - 2 Licenses | $17.99 | per month |
| NZK 1 Month - 3 Licenses | $17.99 | per month |
| 1 Month - 4 Licenses | $21.99 | per month |
| 3 Months - 1 License | $36.99 | per 3 months |
| 3 Months - 2 Licenses | $49.99 | per 3 months |
| 3 Months - 3 Licenses | $49.99 | per 3 months |
| Yearly - 1 License | $118.99 | per year |
| Yearly - 2 Licenses | $154.99 | per year |
| Yearly - 3 Licenses | $154.99 | per year |
| Yearly - 4 Licenses | $189.99 | per year |
| Yearly - 5 Licenses | $239.99 | per year |

**What reviewers like**

- 👍 Fun and engaging
- 🚀 Helps improve writing skills
- 💡 Gamifies learning
- 👍 Motivates reluctant writers
- 👍 Constructive feedback from tutors

**What reviewers complain about**

- 🐛 Glitchy and laggy performance
- 🐛 Inconsistent difficulty levels
- 🔋 Drains device battery
- 🔒 Questionable subscription practices

**Reported bugs**

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

**Requested features**

- Dark mode option
- Compatibility improvements for older devices
- More content for older age groups


## Frequently asked questions

### Is Sudoku School! free?

Sudoku School! 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, Sudoku School! or Night Zookeeper?

Night Zookeeper is rated higher. Sudoku School! averages 4.4 out of 5 from 431 ratings, while Night Zookeeper averages 4.6 from 616 ratings.

### Do Sudoku School! or Night Zookeeper have ads?

Neither Sudoku School! nor Night Zookeeper shows ads.

### Which is updated more often, Sudoku School! or Night Zookeeper?

Sudoku School! ships an update every 7 months, and Night Zookeeper every 2 months. Most recently, Sudoku School! was updated on October 30, 2026 and Night Zookeeper on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*