# 67 Doi Doi vs QuickMathMaster

The clearest difference is review sentiment: QuickMathMaster at 100% against 67 Doi Doi's 50%. QuickMathMaster also leads on rating (5.0 vs 4.0) and iOS requirement (12.0 vs 15.0). 67 Doi Doi's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. QuickMathMaster sells 1 one-off in-app purchase. 67 Doi Doi asks for nothing beyond the download.

QuickMathMaster holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 50% of 67 Doi Doi's written reviews are positive against 100% of QuickMathMaster's.

## The numbers

| Metric | 67 Doi Doi | QuickMathMaster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/67-doi-doi-six-seven-game/id6754794359/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quickmathmaster-brain-game/id6755707607/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | — | Every 3 months |
| Monetization | Ad-supported | Ad-supported |
| Size | 13 MB | 82 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Artem Lanin](https://appshunter.io/developer/1476048551) | [XINGHUA HE](https://appshunter.io/developer/1855752263) |

## What reviewers say

### 67 Doi Doi

[App page](https://appshunter.io/ios/app/67-doi-doi-six-seven-game/id6754794359)

Engage in a variety of fun and challenging puzzles inspired by viral trends. Solve brainteasers involving chains, pop-its, safes, and sliders to uncover viral secrets.

**Highlights:** Chain making puzzles, Pop-it mini-game, Safe opening challenges, Mango saving levels, Basketball slider puzzles, Viral trend integration

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

**In-app purchases:** none


### QuickMathMaster

[App page](https://appshunter.io/ios/app/quickmathmaster-brain-game/id6755707607)

Sharpen your mind with this fast-paced mental math game. Improve calculation speed, focus, and logic through three difficulty levels and timed challenges. Track your progress and aim for top ranks in a distraction-free environment.

**Highlights:** Three difficulty levels, Fast-paced timed challenges, Performance tracking, Distraction-free interface, Logic and memory improvement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Permanent Ad Removal | $0.99 | one-time |


## Frequently asked questions

### Is 67 Doi Doi free?

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

### Is QuickMathMaster free?

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

### Which has better reviews, 67 Doi Doi or QuickMathMaster?

QuickMathMaster is rated higher. 67 Doi Doi averages 4.0 out of 5 from 2 ratings, while QuickMathMaster averages 5.0 from 1 ratings.

### Do 67 Doi Doi or QuickMathMaster have ads?

Both 67 Doi Doi and QuickMathMaster show ads.

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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.*