# 컴시간알리미 vs Chalcack

컴시간알리미 and Chalcack both sit at 5.0 stars, but that hides the real split: 97% of Chalcack's written reviews are positive against 61% of 컴시간알리미's. Chalcack also leads on update cadence (every 2 days vs every 3 weeks) and ratings volume (12 vs 2). 컴시간알리미's advantage is in-app purchases (none vs 3). On price, rating, ads and device support there is nothing between them.

Both are free to download. Chalcack sells 3 in-app purchases, starting at $9.99 per month. 컴시간알리미 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 컴시간알리미 against 5.0 for Chalcack. That said, the two scores are not equally well evidenced: Chalcack has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 61% of 컴시간알리미's written reviews are positive against 97% of Chalcack's.

컴시간알리미 ships an update every 3 weeks, Chalcack every 2 days. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 컴시간알리미 | Chalcack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/id6478664393/reviews) | [5.0 (12 ratings)](https://appshunter.io/ios/app/chalcack-your-study-crush/id6747833381/reviews) |
| Number of ratings | 2 | **12** |
| Positive reviews | 61.2% of reviews | **97.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 49 MB |
| Requires iOS | **17.0** | 18.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [컴시간](https://appshunter.io/developer/1733646932) | [Dong Hae Jang](https://appshunter.io/developer/1573538288) |

## What reviewers say

### 컴시간알리미

[App page](https://appshunter.io/ios/app/id6478664393)

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

**In-app purchases:** none


### Chalcack

[App page](https://appshunter.io/ios/app/chalcack-your-study-crush/id6747833381)

This AI-powered study companion helps students master difficult subjects by providing step-by-step solutions and explanations. It recognizes problems from photos and offers a personalized study vault for review. Get instant academic support anytime, anywhere.

**Highlights:** Snap and solve problems from photos, AI-powered step-by-step explanations, Support for Math, Science, English, and more, Master core concepts and principles, Personal study vault and review library, 24/7 AI academic assistance

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium subscription | $9.99 | per month |
| Yearly Pro (Special Offer) | $59.99 | per year |
| Yearly Premium subscription | $79.99 | per year |


## Frequently asked questions

### Is 컴시간알리미 free?

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

### Is Chalcack free?

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

### Which has better reviews, 컴시간알리미 or Chalcack?

컴시간알리미 and Chalcack are both rated 5.0 out of 5 on the App Store, from 2 and 12 ratings respectively.

### Do 컴시간알리미 or Chalcack have ads?

Both 컴시간알리미 and Chalcack show ads.

### Which is updated more often, 컴시간알리미 or Chalcack?

컴시간알리미 ships an update every 3 weeks, and Chalcack every 2 days. Most recently, 컴시간알리미 was updated on October 20, 2026 and Chalcack on October 18, 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.*