# Solid Sudoku vs Sudoku Calm

The clearest difference is update cadence: Solid Sudoku at every 3 days against Sudoku Calm's every 9 days. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Solid Sudoku ships an update every 3 days, Sudoku Calm every 9 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Solid Sudoku | Sudoku Calm |
| --- | --- | --- |
| Price | **Free** | — |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sudoku-calm/id6761188675/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 9 days |
| Monetization | — | Free |
| Size | 28 MB | 27 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sooyeol Jeong](https://appshunter.io/developer/1877260413) | [HYEKYUNG MOON](https://appshunter.io/developer/1888183128) |

## What reviewers say

### Solid Sudoku

[App page](https://appshunter.io/ios/app/solid-sudoku/id6759184547)

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

**In-app purchases:** none


### Sudoku Calm

[App page](https://appshunter.io/ios/app/sudoku-calm/id6761188675)

This app offers a minimalist Sudoku experience focused on quiet contemplation and daily challenges. Enjoy five difficulty levels, a daily puzzle with streak tracking, and a ghost race mode against past players. It provides a clean interface with helpful tools like number highlighting and smartメモ, all without ads or logins.

**Highlights:** Five difficulty levels, Daily puzzle with streak tracking, Ghost race mode, Number highlighting, Smart memo, Undo and hint functions

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

**In-app purchases:** none


## Frequently asked questions

### Is Solid Sudoku free?

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

### Is Sudoku Calm free?

Pricing for Sudoku Calm is not currently listed on the App Store.

### Do Solid Sudoku or Sudoku Calm have ads?

Both Solid Sudoku and Sudoku Calm show ads.

### Which is updated more often, Solid Sudoku or Sudoku Calm?

Solid Sudoku ships an update every 3 days, and Sudoku Calm every 9 days. Most recently, Solid Sudoku was updated on October 2, 2026 and Sudoku Calm on October 9, 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.*