# kMath vs Spell Ninja

kMath and Spell Ninja both sit at 4.3 stars, but that hides the real split: 100% of Spell Ninja's written reviews are positive against 71% of kMath's. Spell Ninja also leads on ratings volume (34 vs 6). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. kMath sells 1 in-app purchase, starting at $14.99 per 3 months and Spell Ninja sells 6 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.3 for kMath against 4.2 for Spell Ninja. That said, the two scores are not equally well evidenced: Spell Ninja has 34 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 71% of kMath's written reviews are positive against 100% of Spell Ninja's.

kMath ships an update every 3 weeks, Spell Ninja every 2 weeks. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | kMath | Spell Ninja |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/kmath-ikmc-kangaroo-math/id1497065843/reviews)** | [4.2 (34 ratings)](https://appshunter.io/ios/app/spell-ninja-ai-spell-coach/id6749252653/reviews) |
| Number of ratings | 6 | **34** |
| Positive reviews | 71.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 69 MB | 103 MB |
| Requires iOS | **13.0** | 14.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yen Nguyen](https://appshunter.io/developer/1370538562) | [Datonique, Inc](https://appshunter.io/developer/1469017604) |

## What reviewers say

### kMath

[App page](https://appshunter.io/ios/app/kmath-ikmc-kangaroo-math/id1497065843)

Prepare for the International Kangaroo Mathematics Contest with thousands of practice questions and explanations. Covers six levels from grade 1 to 12, with new content updated monthly. Offers an optional subscription for enhanced features.

**Highlights:** Thousands of practice questions, Detailed explanations, Six learning levels (grade 1-12), Monthly content updates, Auto-renewing subscription option, Progress tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Member | $14.99 | per 3 months |


### Spell Ninja

[App page](https://appshunter.io/ios/app/spell-ninja-ai-spell-coach/id6749252653)

This app helps users prepare for spelling competitions with daily drills, AI coaching, and comprehensive word lists. It offers personalized learning paths and performance analytics to improve spelling accuracy and vocabulary.

**Highlights:** Daily spelling drills, AI-powered pattern recognition, Progress tracking and analytics, Comprehensive word lists, Competition simulations, Personalized coaching

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| $6.99 Monthly Subscription | $6.99 | per month |
| $9.99 Monthly Subscription | $9.99 | per month |
| $29.99 Monthly Subscription | $29.99 | per month |
| $49.99 Annual Subscription | $49.99 | per year |
| $99 Annual Subscription | $99.00 | per year |
| $249 Annual Subscription | $249.00 | per year |


## Frequently asked questions

### Is kMath free?

kMath is free to download, with in-app purchases available.

### Is Spell Ninja free?

Spell Ninja is free to download, with in-app purchases available.

### Which has better reviews, kMath or Spell Ninja?

kMath is rated higher. kMath averages 4.3 out of 5 from 6 ratings, while Spell Ninja averages 4.2 from 34 ratings.

### Do kMath or Spell Ninja have ads?

Neither kMath nor Spell Ninja shows ads.

### Which is updated more often, kMath or Spell Ninja?

kMath ships an update every 3 weeks, and Spell Ninja every 2 weeks. Most recently, kMath was updated on November 8, 2026 and Spell Ninja 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.*