# King Sudoku vs Stackly

The clearest difference is in-app purchases: Stackly at none against King Sudoku's 10. Stackly also leads on update cadence (every 4 days vs every 8 days). King Sudoku's advantage is iOS requirement (15.1 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. King Sudoku sells 10 in-app purchases, starting at $0.99 per year. Stackly asks for nothing beyond the download.

King Sudoku ships an update every 8 days, Stackly every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | King Sudoku | Stackly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (12 ratings)](https://appshunter.io/ios/app/king-sudoku-classic-puzzles/id6757116830/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 8 days | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 12 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Enis shelbaya](https://appshunter.io/developer/1614712179) | [SEBASTIEN RUEL](https://appshunter.io/developer/1867569411) |

## What reviewers say

### King Sudoku

[App page](https://appshunter.io/ios/app/king-sudoku-classic-puzzles/id6757116830)

Enjoy Sudoku puzzles without intrusive advertisements. This app offers a distraction-free environment with multiple difficulty levels and daily challenges. Save your progress and play offline, anytime, anywhere.

**Highlights:** Zero interrupting ads, Multiple difficulty levels, Clean, minimal interface, Auto-save progress, Daily Sudoku challenges, Offline play

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| sub_supporter_yearly | $0.99 | per year |
| King Sudoku Premium | $1.99 | per month |
| sub_patron_yearly | $2.99 | per year |
| King Sudoku Premium | $2.99 | per month |
| sub_champion_yearly | $4.99 | per year |
| King Sudoku Premium | $14.99 | per year |
| sub_benefactor_yearly | $24.99 | per year |
| King Sudoku Premium | $24.99 | per year |
| sub_icon_yearly | $49.99 | per year |
| sub_legend_yearly | $99.99 | per year |


### Stackly

[App page](https://appshunter.io/ios/app/stackly/id6757546882)

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

**In-app purchases:** none


## Frequently asked questions

### Is King Sudoku free?

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

### Is Stackly free?

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

### Do King Sudoku or Stackly have ads?

Both King Sudoku and Stackly show ads.

### Which is updated more often, King Sudoku or Stackly?

King Sudoku ships an update every 8 days, and Stackly every 4 days. Most recently, King Sudoku was updated on October 31, 2026 and Stackly on October 31, 2026.

---

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