# Detective Diary vs 무한 수학 퀴즈

The clearest difference is in-app purchases: 무한 수학 퀴즈 at none against Detective Diary's 5. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Detective Diary sells 5 in-app purchases, starting at $3.99 per month. 무한 수학 퀴즈 asks for nothing beyond the download.

Detective Diary ships an update fortnightly, 무한 수학 퀴즈 weekly. Both last shipped on November 13, 2026.

## The numbers

| Metric | Detective Diary | 무한 수학 퀴즈 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 233 MB | 48 MB |
| Requires iOS | **15.1** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 12+ |
| Developer | [Junsu Hwang](https://appshunter.io/developer/1745070010) | [EcodeLab](https://appshunter.io/developer/1817556004) |

## What reviewers say

### Detective Diary

[App page](https://appshunter.io/ios/app/detective-diary-whodunit/id6760389759)

Engage in daily AI-powered mystery games where you interrogate suspects, investigate locations, and analyze evidence to solve new cases. Compete for high scores and climb leaderboards by thinking like a real detective.

**Highlights:** AI interrogation of suspects, New mystery case daily, Investigate locations and evidence, Deduce culprit, motive, and method, Efficiency scoring and leaderboards, Share case results with friends

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Detective Pass | $3.99 | per month |
| 100 credit | $0.49 | one-time |
| 330 credit | $1.99 | one-time |
| 850 credit | $4.99 | one-time |
| 1500 credit | $6.99 | one-time |


### 무한 수학 퀴즈

[App page](https://appshunter.io/ios/app/id6775210879)

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

**In-app purchases:** none


## Frequently asked questions

### Is Detective Diary free?

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

### Is 무한 수학 퀴즈 free?

무한 수학 퀴즈 is free to download, with no in-app purchases.

### Do Detective Diary or 무한 수학 퀴즈 have ads?

Both Detective Diary and 무한 수학 퀴즈 show ads.

### Which is updated more often, Detective Diary or 무한 수학 퀴즈?

Detective Diary ships an update fortnightly, and 무한 수학 퀴즈 weekly. Most recently, Detective Diary was updated on November 13, 2026 and 무한 수학 퀴즈 on November 13, 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.*