# 클라크 vs Rock Lock

The clearest difference is in-app purchases: 클라크 at none against Rock Lock's 2. 클라크 also leads on update cadence (every 2 days vs fortnightly) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Rock Lock sells 1 one-off in-app purchase. 클라크 asks for nothing beyond the download.

클라크 ships an update every 2 days, Rock Lock fortnightly. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 클라크 | Rock Lock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Fortnightly |
| Size | 167 MB | 12 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chanwoo Seong](https://appshunter.io/developer/1135679194) | [Ron Yahav](https://appshunter.io/developer/1879738117) |

## What reviewers say

### 클라크

[App page](https://appshunter.io/ios/app/id6758343693)

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

**In-app purchases:** none


### Rock Lock

[App page](https://appshunter.io/ios/app/rock-lock-app-blocker/id6760949840)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rock Lock Pro | $2.99 | one-time |


## Frequently asked questions

### Is 클라크 free?

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

### Is Rock Lock free?

Rock Lock is free to download, with in-app purchases available.

### Do 클라크 or Rock Lock have ads?

Neither 클라크 nor Rock Lock shows ads.

### Which is updated more often, 클라크 or Rock Lock?

클라크 ships an update every 2 days, and Rock Lock fortnightly. Most recently, 클라크 was updated on October 17, 2026 and Rock Lock on October 2, 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.*