# Sudoku on Chalkboard vs 转盘做决定

The clearest difference is review sentiment: 转盘做决定 at 75% against Sudoku on Chalkboard's 25%. 转盘做决定 also leads on price (Free vs $2.99) and ads (none vs shown). Sudoku on Chalkboard's advantage is in-app purchases (none vs 1). On device support and iOS requirement there is nothing between them.

转盘做决定 is free to download; Sudoku on Chalkboard costs $2.99 up front. 转盘做决定 sells 1 one-off in-app purchase. Sudoku on Chalkboard asks for nothing beyond the download.

Sudoku on Chalkboard ships an update every 10 months, 转盘做决定 every 6 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Sudoku on Chalkboard | 转盘做决定 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[2.3 (4 ratings)](https://appshunter.io/ios/app/sudoku-on-chalkboard/id581467260/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 25.0% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | Ad-supported | — |
| Size | 19 MB | 8 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Oscar Tsang](https://appshunter.io/developer/416987065) | [创宏 陈](https://appshunter.io/developer/1884920634) |

## What reviewers say

### Sudoku on Chalkboard

[App page](https://appshunter.io/ios/app/sudoku-on-chalkboard/id581467260)

Experience the tactile feel of drawing on a chalkboard with this app's unique visual style. It offers an endless supply of dynamically generated puzzles, including a special 'Kid' level to encourage learning. Save your progress automatically across five difficulty settings.

**Highlights:** Chalkboard drawing effect, Dynamically generated Sudoku puzzles, Unlimited gameplay, Kid-friendly difficulty level, Automatic game saving, Five difficulty levels

**In-app purchases:** none


### 转盘做决定

[App page](https://appshunter.io/ios/app/id6760802436)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久VIP会员・永久解锁所有会员功能 | $0.99 | one-time |


## Frequently asked questions

### Is Sudoku on Chalkboard free?

Sudoku on Chalkboard costs $2.99, with no in-app purchases.

### Is 转盘做决定 free?

转盘做决定 is free to download, with in-app purchases available.

### Do Sudoku on Chalkboard or 转盘做决定 have ads?

Sudoku on Chalkboard shows ads; 转盘做决定 does not.

### Which is updated more often, Sudoku on Chalkboard or 转盘做决定?

Sudoku on Chalkboard ships an update every 10 months, and 转盘做决定 every 6 weeks. Most recently, Sudoku on Chalkboard was updated on November 1, 2026 and 转盘做决定 on November 5, 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.*