# 그루스터디센터 vs Proof Workshop

The clearest difference is in-app purchases: 그루스터디센터 at none against Proof Workshop's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Proof Workshop sells 1 one-off in-app purchase. 그루스터디센터 asks for nothing beyond the download.

그루스터디센터 ships an update every 5 weeks, Proof Workshop every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 그루스터디센터 | Proof Workshop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (7 ratings)](https://appshunter.io/ios/app/id1457210251/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 68 MB | 20 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OHRAE Inc.](https://appshunter.io/developer/1161656350) | [INPHIL CHOI](https://appshunter.io/developer/6785766361) |

## What reviewers say

### 그루스터디센터

[App page](https://appshunter.io/ios/app/id1457210251)

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

**In-app purchases:** none


### Proof Workshop

[App page](https://appshunter.io/ios/app/proof-workshop-math-major/id6816328454)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $4.99 | one-time |


## Frequently asked questions

### Is 그루스터디센터 free?

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

### Is Proof Workshop free?

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

### Do 그루스터디센터 or Proof Workshop have ads?

Neither 그루스터디센터 nor Proof Workshop shows ads.

### Which is updated more often, 그루스터디센터 or Proof Workshop?

그루스터디센터 ships an update every 5 weeks, and Proof Workshop every 3 weeks. Most recently, 그루스터디센터 was updated on October 25, 2026 and Proof Workshop on October 24, 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.*