# Silent Camera Study vs CHSK

The clearest difference is update cadence: CHSK at every 2 days against Silent Camera Study's every 4 days. Silent Camera Study's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Silent Camera Study ships an update every 4 days, CHSK every 2 days. The most recent releases landed on October 9, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Silent Camera Study | CHSK |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | — | Free |
| Size | 44 MB | 102 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Kuta Yushikai](https://appshunter.io/developer/1550434338) | [Wuxi Wudao Matrix Information Technology Co., Ltd](https://appshunter.io/developer/1884923310) |

## What reviewers say

### Silent Camera Study

[App page](https://appshunter.io/ios/app/silent-camera-study/id1609732229)

**Features:** macOS Compatibility

**In-app purchases:** none


### CHSK

[App page](https://appshunter.io/ios/app/chsk/id6772783157)

Prepare for HSK Chinese proficiency tests from levels 1 to 6 with mock exams, targeted practice modules, and vocabulary flashcards. Engage in word matching games and access a comprehensive grammar list with search functionality.

**Highlights:** Mock HSK exams with timer, Targeted listening, reading, writing practice, Bilingual vocabulary flashcards, Timed word matching game, Grammar points index and search

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

**In-app purchases:** none


## Frequently asked questions

### Is Silent Camera Study free?

Silent Camera Study is free to download, with no in-app purchases.

### Is CHSK free?

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

### Do Silent Camera Study or CHSK have ads?

Neither Silent Camera Study nor CHSK shows ads.

### Which is updated more often, Silent Camera Study or CHSK?

Silent Camera Study ships an update every 4 days, and CHSK every 2 days. Most recently, Silent Camera Study was updated on October 9, 2026 and CHSK on September 28, 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.*