# 答案之书 vs AmDetective

The clearest difference is price: 答案之书 at Free against AmDetective's $0.99. 答案之书 also leads on review sentiment (17% vs 0%) and iOS requirement (15.0 vs 17.0). AmDetective's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support there is nothing between them.

答案之书 is free to download; AmDetective costs $0.99 up front. 答案之书 sells 1 one-off in-app purchase. AmDetective asks for nothing beyond the download.

答案之书 ships an update every 12 months, AmDetective every 8 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 答案之书 | AmDetective |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | **16.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 8 months** |
| Monetization | — | Paid |
| Size | 6 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [唯墨科技](https://appshunter.io/developer/1240699340) | [力 李](https://appshunter.io/developer/1824464542) |

## What reviewers say

### 答案之书

[App page](https://appshunter.io/ios/app/id1475703134)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解锁无限问题 | $0.99 | one-time |


### AmDetective

[App page](https://appshunter.io/ios/app/amdetective/id6748215532)

Engage in a virtual mystery world where you solve puzzles by searching intricate scenes for clues and analyzing evidence. This game offers a unique blend of reading and interaction to uncover the truth. It's designed for both experienced mystery game players and newcomers.

**Highlights:** Immersive mystery world, 3x3 grid scene navigation, Clue searching and evidence analysis, Virtual and real gameplay blend, Brain-teasing puzzles, Regular level updates

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

**In-app purchases:** none


## Frequently asked questions

### Is 答案之书 free?

答案之书 is free to download, with in-app purchases available.

### Is AmDetective free?

AmDetective costs $0.99, with no in-app purchases.

### Do 答案之书 or AmDetective have ads?

答案之书 shows ads; AmDetective does not.

### Which is updated more often, 答案之书 or AmDetective?

答案之书 ships an update every 12 months, and AmDetective every 8 months. Most recently, 答案之书 was updated on November 3, 2026 and AmDetective on October 30, 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.*