# Ultimate Sudoku App vs Crack the Code 4 Watch

The clearest difference is price: Ultimate Sudoku App at Free against Crack the Code 4 Watch's $0.99. Ultimate Sudoku App also leads on update cadence (every 6 days vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Ultimate Sudoku App is free to download; Crack the Code 4 Watch costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ultimate Sudoku App ships an update every 6 days, Crack the Code 4 Watch every 6 weeks. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Ultimate Sudoku App | Crack the Code 4 Watch |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 6 weeks |
| Size | 40 MB | 1 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Michele Yin](https://appshunter.io/developer/1802479962) | [Bolo mobile, Inc](https://appshunter.io/developer/1668873823) |

## What reviewers say

### Ultimate Sudoku App

[App page](https://appshunter.io/ios/app/ultimate-sudoku-app/id6743371040)

**Features:** macOS Compatibility

**In-app purchases:** none


### Crack the Code 4 Watch

[App page](https://appshunter.io/ios/app/crack-the-code-4-watch/id6743397956)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Ultimate Sudoku App free?

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

### Is Crack the Code 4 Watch free?

Crack the Code 4 Watch costs $0.99, with no in-app purchases.

### Do Ultimate Sudoku App or Crack the Code 4 Watch have ads?

Neither Ultimate Sudoku App nor Crack the Code 4 Watch shows ads.

### Which is updated more often, Ultimate Sudoku App or Crack the Code 4 Watch?

Ultimate Sudoku App ships an update every 6 days, and Crack the Code 4 Watch every 6 weeks. Most recently, Ultimate Sudoku App was updated on October 9, 2026 and Crack the Code 4 Watch on October 4, 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.*