# U vs 클래스유

The clearest difference is review sentiment: 클래스유 at 86% against U's 29%. 클래스유 also leads on rating (4.6 vs 3.8) and update cadence (every 4 days vs every 3 months). U's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. 클래스유 sells 2 one-off in-app purchases. U asks for nothing beyond the download.

클래스유 holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: 클래스유 has 27 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 29% of U's written reviews are positive against 86% of 클래스유's.

U ships an update every 3 months, 클래스유 every 4 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | U | 클래스유 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/u-knou/id1346391846/reviews) | **[4.6 (27 ratings)](https://appshunter.io/ios/app/id1464482964/reviews)** |
| Number of ratings | 5 | **27** |
| Positive reviews | 29.1% of reviews | **86.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 157 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Korea National Open University](https://appshunter.io/developer/504499080) | [MINSOO SHIN](https://appshunter.io/developer/1089441440) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-knou/id1346391846)

Access over 1000 online courses from Korea National Open University, suitable for both students and lifelong learners. Enjoy a seamless learning experience with features like video lecture downloads and personalized notifications.

**Highlights:** 1000+ diverse online courses, PC-like learning environment, Video lecture downloads, Personalized learning schedules, Course-related notifications, Access for students and general public

**In-app purchases:** none


### 클래스유

[App page](https://appshunter.io/ios/app/id1464482964)

Discover and share your expertise through online classes. Learn new skills from experts or teach your own, with interactive features to enhance the learning experience. Enjoy unlimited access to a wide variety of courses anytime, anywhere.

**Highlights:** Discover diverse online classes, Learn from expert creators, Share your own expertise, Interactive learning with peers, Unlimited course access, Earn additional income

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1달정액권 49000원 | $34.99 | one-time |
| 1:1 프리미엄 서비스 99000원 | $64.99 | one-time |


## Frequently asked questions

### Is U free?

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

### Is 클래스유 free?

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

### Which has better reviews, U or 클래스유?

클래스유 is rated higher. U averages 3.8 out of 5 from 5 ratings, while 클래스유 averages 4.6 from 27 ratings.

### Do U or 클래스유 have ads?

Neither U nor 클래스유 shows ads.

### Which is updated more often, U or 클래스유?

U ships an update every 3 months, and 클래스유 every 4 days. Most recently, U was updated on November 2, 2026 and 클래스유 on November 3, 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.*