# YPT vs Mobile@HKUL (HKU Libraries)

The clearest difference is in-app purchases: Mobile@HKUL (HKU Libraries) at none against YPT's 8. YPT's advantage is update cadence (every 2 days vs every 4 months) and device support (4 vs 2). On price, ads 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. Mobile@HKUL (HKU Libraries) asks for nothing beyond the download.

YPT ships an update every 2 days, Mobile@HKUL (HKU Libraries) every 4 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | YPT | Mobile@HKUL (HKU Libraries) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.8K ratings)](https://appshunter.io/ios/app/ypt-study-group/id1441909643/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 55.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 248 MB | 69 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [UnCheon Baek](https://appshunter.io/developer/1143037815) | [HKU Libraries](https://appshunter.io/developer/1513119976) |

## What reviewers say

### 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


### Mobile@HKUL (HKU Libraries)

[App page](https://appshunter.io/ios/app/mobilehkul-hku-libraries/id1513119977)

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

**In-app purchases:** none


## Frequently asked questions

### Is YPT free?

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

### Is Mobile@HKUL (HKU Libraries) free?

Mobile@HKUL (HKU Libraries) is free to download, with no in-app purchases.

### Do YPT or Mobile@HKUL (HKU Libraries) have ads?

Neither YPT nor Mobile@HKUL (HKU Libraries) shows ads.

### Which is updated more often, YPT or Mobile@HKUL (HKU Libraries)?

YPT ships an update every 2 days, and Mobile@HKUL (HKU Libraries) every 4 months. Most recently, YPT was updated on November 1, 2026 and Mobile@HKUL (HKU Libraries) on October 27, 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.*