# CRock vs 100 Dev Mistakes

The clearest difference is in-app purchases: CRock at none against 100 Dev Mistakes's 3. CRock also leads on iOS requirement (17.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 100 Dev Mistakes sells 3 in-app purchases, starting at $2.99 per month. CRock asks for nothing beyond the download.

CRock ships an update every 3 months, 100 Dev Mistakes every 2 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CRock | 100 Dev Mistakes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 187 MB | 13 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [hyunheum na](https://appshunter.io/developer/1809310371) | [hyunho lee](https://appshunter.io/developer/1502508537) |

## What reviewers say

### CRock

[App page](https://appshunter.io/ios/app/crock/id6749784650)

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

**In-app purchases:** none


### 100 Dev Mistakes

[App page](https://appshunter.io/ios/app/100-dev-mistakes-grow-fast/id6759643878)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1달 구독 | $2.99 | per month |
| 1년 구독 | $14.99 | per year |
| 평생 구매 | $19.99 | one-time |


## Frequently asked questions

### Is CRock free?

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

### Is 100 Dev Mistakes free?

100 Dev Mistakes is free to download, with in-app purchases available.

### Do CRock or 100 Dev Mistakes have ads?

Neither CRock nor 100 Dev Mistakes shows ads.

### Which is updated more often, CRock or 100 Dev Mistakes?

CRock ships an update every 3 months, and 100 Dev Mistakes every 2 months. Most recently, CRock was updated on October 30, 2026 and 100 Dev Mistakes on October 31, 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.*