# Duo Blocks vs Pure Logic

The clearest difference is in-app purchases: Duo Blocks at none against Pure Logic's 2. Duo Blocks also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Pure Logic sells 2 one-off in-app purchases. Duo Blocks asks for nothing beyond the download.

Both ship on a similar rhythm, roughly daily. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Duo Blocks | Pure Logic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pure-logic-brain-puzzles/id6810033029/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Daily | Daily |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 110 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Inaba](https://appshunter.io/developer/1896551072) | [贵权 陈](https://appshunter.io/developer/6809852956) |

## What reviewers say

### Duo Blocks

[App page](https://appshunter.io/ios/app/duo-blocks/id6768885620)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pure Logic

[App page](https://appshunter.io/ios/app/pure-logic-brain-puzzles/id6810033029)

Engage your mind with six distinct logic puzzle games including Sudoku, Nonogram, and Queens. Enjoy adjustable difficulty, helpful hints, and customizable themes. Play at your own pace with progress saved locally.

**Highlights:** Six logic puzzle types, Adjustable difficulty levels, Hint and undo options, Customizable themes and board skins, Local progress saving, No account required

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Polar Crystal | $1.99 | one-time |
| Pure Logic Pro | $3.99 | one-time |


## Frequently asked questions

### Is Duo Blocks free?

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

### Is Pure Logic free?

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

### Do Duo Blocks or Pure Logic have ads?

Neither Duo Blocks nor Pure Logic shows ads.

### Which is updated more often, Duo Blocks or Pure Logic?

Duo Blocks ships an update daily, and Pure Logic daily. Most recently, Duo Blocks was updated on October 25, 2026 and Pure Logic on October 7, 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.*