# Mathmaji vs Kai Reads

The clearest difference is in-app purchases: Kai Reads at none against Mathmaji's 2. Mathmaji's advantage is update cadence (weekly vs every 6 weeks) and iOS requirement (14.0 vs 26.5). On price, ads and device support there is nothing between them.

Both are free to download. Mathmaji sells 2 in-app purchases, starting at $15.00 per month. Kai Reads asks for nothing beyond the download.

Mathmaji ships an update weekly, Kai Reads every 6 weeks. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Mathmaji | Kai Reads |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (9 ratings)](https://appshunter.io/ios/app/mathmaji/id6469683426/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 82 MB | 17 MB |
| Requires iOS | **14.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mathmaji Co., Ltd.](https://appshunter.io/developer/1712282132) | [Victor Galloza](https://appshunter.io/developer/767144584) |

## What reviewers say

### Mathmaji

[App page](https://appshunter.io/ios/app/mathmaji/id6469683426)

This app offers a K-5 math curriculum using the Japanese method of structured problem-solving. It features over 500 exercises designed to build confidence, comprehension, and mental calculation skills. Track progress with a comprehensive learning management system.

**Highlights:** K-5 numerical math curriculum, 500+ engaging exercises, Japanese instruction techniques, Tailored lessons and games, Comprehensive Learning Management System, Boosts confidence and comprehension

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly(1 Month) | $15.00 | per month |
| Plus Annual (1 Year) | $124.99 | per year |


### Kai Reads

[App page](https://appshunter.io/ios/app/kai-reads/id6790004296)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mathmaji free?

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

### Is Kai Reads free?

Kai Reads is free to download, with no in-app purchases.

### Do Mathmaji or Kai Reads have ads?

Neither Mathmaji nor Kai Reads shows ads.

### Which is updated more often, Mathmaji or Kai Reads?

Mathmaji ships an update weekly, and Kai Reads every 6 weeks. Most recently, Mathmaji was updated on October 24, 2026 and Kai Reads on October 16, 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.*