# Sudoku Kaidoku vs Sudoku Tutor

The clearest difference is in-app purchases: Sudoku Tutor at none against Sudoku Kaidoku's 1. Sudoku Tutor also leads on update cadence (every 3 weeks vs every 5 months). Sudoku Kaidoku's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Sudoku Kaidoku sells 1 one-off in-app purchase. Sudoku Tutor asks for nothing beyond the download.

Sudoku Kaidoku ships an update every 5 months, Sudoku Tutor every 3 weeks. The most recent releases landed on November 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sudoku Kaidoku | Sudoku Tutor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Size | 23 MB | 13 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Katsutoshi Seki](https://appshunter.io/developer/1692159497) | [Kenichi Nakagawa](https://appshunter.io/developer/1831663034) |

## What reviewers say

### Sudoku Kaidoku

[App page](https://appshunter.io/ios/app/sudoku-kaidoku/id6450177207)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version | $2.99 | one-time |


### Sudoku Tutor

[App page](https://appshunter.io/ios/app/sudoku-tutor-camera-solver/id6755796331)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku Kaidoku free?

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

### Is Sudoku Tutor free?

Sudoku Tutor is free to download, with no in-app purchases.

### Do Sudoku Kaidoku or Sudoku Tutor have ads?

Sudoku Tutor shows ads; Sudoku Kaidoku does not.

### Which is updated more often, Sudoku Kaidoku or Sudoku Tutor?

Sudoku Kaidoku ships an update every 5 months, and Sudoku Tutor every 3 weeks. Most recently, Sudoku Kaidoku was updated on November 7, 2026 and Sudoku Tutor on October 25, 2026.

---

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