# CLASSUM vs 윤재성 소리영어

The clearest difference is in-app purchases: CLASSUM at none against 윤재성 소리영어's 1. CLASSUM also leads on review sentiment (63% vs 29%) and update cadence (fortnightly vs every 5 weeks). 윤재성 소리영어's advantage is iOS requirement (13.0 vs 15.1). On price, rating, ads and device support there is nothing between them.

Both are free to download. 윤재성 소리영어 sells 1 one-off in-app purchase. CLASSUM asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.8 for CLASSUM against 3.8 for 윤재성 소리영어. Both are backed by a comparable volume of ratings — 20 and 6 respectively. Written reviews are what separate them: 63% of CLASSUM's written reviews are positive against 29% of 윤재성 소리영어's.

CLASSUM ships an update fortnightly, 윤재성 소리영어 every 5 weeks. The most recent releases landed on October 22, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | CLASSUM | 윤재성 소리영어 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (20 ratings)](https://appshunter.io/ios/app/classum/id1397400392/reviews) | [3.8 (6 ratings)](https://appshunter.io/ios/app/id1409088377/reviews) |
| Number of ratings | **20** | 6 |
| Positive reviews | **63.0% of reviews** | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 85 MB | 41 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CLASSUM Co., Ltd.](https://appshunter.io/developer/1463925466) | [YUNJEASUNG ENGLISH Co.,Ltd.](https://appshunter.io/developer/1409088376) |

## What reviewers say

### CLASSUM

[App page](https://appshunter.io/ios/app/classum/id1397400392)

This platform fosters active communication and engagement between students and instructors, creating a dynamic learning environment. It offers AI-powered tools for educators and students, alongside flexible features for global collaboration and system integration.

**Highlights:** SNS-style communication, Anonymous questions, AI tutor for students and instructors, Multi-language support, Flexible curriculum design, Team activity collaboration, Interactive challenges

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

**In-app purchases:** none


### 윤재성 소리영어

[App page](https://appshunter.io/ios/app/id1409088377)

This iPhone-exclusive app provides video and audio lectures for English learning. Audio lectures can play in the background for convenient study. Downloaded content is accessible for 48 hours due to DRM.

**Highlights:** Video lectures, Audio lectures, Background audio playback, DRM protected content, Aqua player

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 윤재성 영어 강의 | $499.99 | one-time |


## Frequently asked questions

### Is CLASSUM free?

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

### Is 윤재성 소리영어 free?

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

### Which has better reviews, CLASSUM or 윤재성 소리영어?

CLASSUM and 윤재성 소리영어 are both rated 3.8 out of 5 on the App Store, from 20 and 6 ratings respectively.

### Do CLASSUM or 윤재성 소리영어 have ads?

Neither CLASSUM nor 윤재성 소리영어 shows ads.

### Which is updated more often, CLASSUM or 윤재성 소리영어?

CLASSUM ships an update fortnightly, and 윤재성 소리영어 every 5 weeks. Most recently, CLASSUM was updated on October 22, 2026 and 윤재성 소리영어 on October 14, 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.*