# Chessdoku vs must be one

The clearest difference is in-app purchases: must be one at none against Chessdoku's 1. Chessdoku's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Chessdoku sells 1 one-off in-app purchase. must be one asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Chessdoku | must be one |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chessdoku/id6789803491/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 6 MB |
| Requires iOS | 16.4 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Matt Falk](https://appshunter.io/developer/6789803493) | [office-canard games](https://appshunter.io/developer/6793797221) |

## What reviewers say

### Chessdoku

[App page](https://appshunter.io/ios/app/chessdoku/id6789803491)

This logic puzzle game combines Sudoku-style placement with chess piece attack rules. Solve over 1,500 unique puzzles across five distinct game modes, with a daily challenge for all players. Enjoy a pure, offline experience with no ads or tracking.

**Highlights:** Sudoku-style piece placement, Chess piece attack logic, Five unique game modes, 1,500 puzzles, Daily challenge, Offline play, Hint system with deductions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Everything | $4.99 | one-time |


### must be one

[App page](https://appshunter.io/ios/app/must-be-one/id6794124997)

**In-app purchases:** none


## Frequently asked questions

### Is Chessdoku free?

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

### Is must be one free?

must be one is free to download, with no in-app purchases.

### Do Chessdoku or must be one have ads?

must be one shows ads; Chessdoku does not.

### Which is updated more often, Chessdoku or must be one?

Chessdoku ships an update every 5 weeks, and must be one every 5 weeks. Most recently, Chessdoku was updated on October 8, 2026 and must be one on October 6, 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.*