# KNU 도서관 vs YPT

The clearest difference is review sentiment: YPT at 56% against KNU 도서관's 8%. YPT also leads on update cadence (every 2 days vs every 4 months). KNU 도서관's advantage is in-app purchases (none vs 8). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. YPT sells 8 in-app purchases, starting at $2.99 per month. KNU 도서관 asks for nothing beyond the download.

KNU 도서관 ships an update every 4 months, YPT every 2 days. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | KNU 도서관 | YPT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (1.7K ratings)](https://appshunter.io/ios/app/ypt-study-group/id1441909643/reviews)** |
| Number of ratings | — | **1.7K** |
| Positive reviews | 7.7% of reviews | **55.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 266 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [INEK corp.](https://appshunter.io/developer/494214129) | [UnCheon Baek](https://appshunter.io/developer/1143037815) |

## What reviewers say

### KNU 도서관

[App page](https://appshunter.io/ios/app/knu/id1154430744)

Access library information, manage your loans, and view personal notices. Reserve seats and facilities, request new materials, and utilize your mobile student ID. Explore floor plans and access domestic e-books.

**Highlights:** Library information (hours, floor plans), Loan management and personal notices, Seat and facility reservations, Material purchase requests, Mobile student ID integration, Domestic e-book access

**Features:** Vision Pro support

**In-app purchases:** none


### YPT

[App page](https://appshunter.io/ios/app/ypt-study-group/id1441909643)

Connect with millions globally to study together remotely. Track your progress, set daily goals, and join or create study groups. Visualize your achievements with detailed statistics and compete with others through real-time rankings.

**Highlights:** Time tracking for subjects, Daily 10-minute planner, Study group creation, Real-time ranking, Study statistics visualization, Friend activity monitoring

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $2.99 | per month |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |
| 100 flames | $0.99 | one-time |
| Unlock Apps | $0.99 | one-time |
| 600 flames | $3.99 | one-time |
| 6 months | $11.99 | one-time |
| 12months | $19.99 | one-time |

**What reviewers like**

- 🚀 Motivating and competitive
- 👍 Comprehensive features (timer, planner, study groups)
- 🎨 Customizable themes and aesthetics
- 🔊 Helpful background noise options

**What reviewers complain about**

- 🐛 Bugs and glitches (freezing, crashing, time recording issues)
- ⏱️ Time zone issues for users outside of Korea
- 🔒 Restricted app access during study sessions

**Reported bugs**

- Timer not stopping when exiting the app
- Inconsistent time recording across devices
- Sudden language changes without user input
- Connectivity issues and server problems

**Requested features**

- Add ability to edit/remove specific study time entries
- Implement a desktop/web version of the app
- Allow more customization options for the calendar and planner
- Improve the allowed apps feature to work more reliably


## Frequently asked questions

### Is KNU 도서관 free?

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

### Is YPT free?

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

### Do KNU 도서관 or YPT have ads?

Neither KNU 도서관 nor YPT shows ads.

### Which is updated more often, KNU 도서관 or YPT?

KNU 도서관 ships an update every 4 months, and YPT every 2 days. Most recently, KNU 도서관 was updated on October 6, 2026 and YPT 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.*