# Collaborative Sudoku vs WhosDunIt

The clearest difference is ads: Collaborative Sudoku at none against WhosDunIt's shown. WhosDunIt's advantage is update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Collaborative Sudoku ships an update every 3 weeks, WhosDunIt every 5 days. The most recent releases landed on September 30, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Collaborative Sudoku | WhosDunIt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/collaborative-sudoku/id6757662311/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 29 MB | 55 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jason Huang](https://appshunter.io/developer/1704879454) | [StruckChord Labs](https://appshunter.io/developer/6789514917) |

## What reviewers say

### Collaborative Sudoku

[App page](https://appshunter.io/ios/app/collaborative-sudoku/id6757662311)

Engage in real-time Sudoku challenges with friends on a shared grid. This app offers live updates, collaborative note-taking, and a minimalist design for a smarter, team-based puzzle experience.

**Highlights:** Real-time collaborative gameplay, Shared puzzle rooms, Live player move updates, Shared notes and markings, Clean, minimalist design, Optimized for iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


### WhosDunIt

[App page](https://appshunter.io/ios/app/whosdunit/id6789514915)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Collaborative Sudoku free?

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

### Is WhosDunIt free?

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

### Do Collaborative Sudoku or WhosDunIt have ads?

WhosDunIt shows ads; Collaborative Sudoku does not.

### Which is updated more often, Collaborative Sudoku or WhosDunIt?

Collaborative Sudoku ships an update every 3 weeks, and WhosDunIt every 5 days. Most recently, Collaborative Sudoku was updated on September 30, 2026 and WhosDunIt on September 19, 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.*