# Katch vs 誰是臥底

The clearest difference is in-app purchases: Katch at none against 誰是臥底's 4. Katch also leads on iOS requirement (13.0 vs 15.0). 誰是臥底's advantage is update cadence (weekly vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. 誰是臥底 sells 4 one-off in-app purchases. Katch asks for nothing beyond the download.

Katch ships an update every 3 weeks, 誰是臥底 weekly. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Katch | 誰是臥底 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 152 MB | 82 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Katch (HK) Limited](https://appshunter.io/developer/1438385381) | [Best Partner Tech Limited](https://appshunter.io/developer/1760716693) |

## What reviewers say

### Katch

[App page](https://appshunter.io/ios/app/katch/id1438385382)

**Features:** macOS Compatibility

**In-app purchases:** none


### 誰是臥底

[App page](https://appshunter.io/ios/app/id1533757733)

A social deduction game where players try to identify the imposter. Offers various themes to enhance gameplay and enjoyment.

**Highlights:** Identify the imposter, Themed rounds, Social deduction gameplay, Multiplayer interaction

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 18 Plus | $0.99 | one-time |
| 明星名 | $0.99 | one-time |
| 周星馳 | $0.99 | one-time |
| 學生時代 | $0.99 | one-time |


## Frequently asked questions

### Is Katch free?

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

### Is 誰是臥底 free?

誰是臥底 is free to download, with in-app purchases available.

### Do Katch or 誰是臥底 have ads?

Neither Katch nor 誰是臥底 shows ads.

### Which is updated more often, Katch or 誰是臥底?

Katch ships an update every 3 weeks, and 誰是臥底 weekly. Most recently, Katch was updated on September 17, 2026 and 誰是臥底 on September 26, 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.*