# Check vs 誰是臥底

The clearest difference is in-app purchases: Check at none against 誰是臥底's 1. Check also leads on ads (none vs shown). 誰是臥底's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. 誰是臥底 sells 1 in-app purchase, starting at $0.99 per month. Check asks for nothing beyond the download.

Check ships an update every 5 weeks, 誰是臥底 every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Check | 誰是臥底 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/check-in-box/id6474719999/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 32 MB | 22 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Yi-Chin Hsu](https://appshunter.io/developer/1591798476) | [LiangYu Ko](https://appshunter.io/developer/1758015388) |

## What reviewers say

### Check

[App page](https://appshunter.io/ios/app/check-in-box/id6474719999)

This app facilitates engaging warm-up games and conversation starters to foster deeper connections. It's designed for team meetings, social gatherings, or personal reflection, with monthly themes to inspire interaction and self-discovery.

**Highlights:** Conversation starters, Warm-up games, Team building icebreakers, Social gathering icebreakers, Personal reflection prompts, Monthly themes

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

**In-app purchases:** none


### 誰是臥底

[App page](https://appshunter.io/ios/app/id6553973564)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 找出臥底 Pro | $0.99 | per month |


## Frequently asked questions

### Is Check free?

Check 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 Check or 誰是臥底 have ads?

誰是臥底 shows ads; Check does not.

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

Check ships an update every 5 weeks, and 誰是臥底 every 2 months. Most recently, Check was updated on November 4, 2026 and 誰是臥底 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.*