# PSU LibX vs RevisionSuccess

The clearest difference is in-app purchases: PSU LibX at none against RevisionSuccess's 2. PSU LibX also leads on update cadence (every 4 days vs every 9 days) and iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. RevisionSuccess sells 2 in-app purchases, starting at $12.00 per month. PSU LibX asks for nothing beyond the download.

PSU LibX ships an update every 4 days, RevisionSuccess every 9 days. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | PSU LibX | RevisionSuccess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/revisionsuccess-ai-study-app/id6776130065/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Monetization | **Free** | Freemium |
| Size | 50 MB | 44 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PRINCE OF SONGKLA UNIVERSITY](https://appshunter.io/developer/1456089991) | [REVISIONSUCCESS COMPANY LIMITED](https://appshunter.io/developer/6776130277) |

## What reviewers say

### PSU LibX

[App page](https://appshunter.io/ios/app/psu-libx/id6470150838)

Enhance your library experience with this app, offering features like QR code entry, book searching across multiple campuses, and self-checkout. It also allows for fine payments and free eBook access.

**Highlights:** QR code/barcode for library entry, Search books across 5 campuses, Self-checkout books, Pay library fines, Read free eBooks, Face recognition entry, Biometric authentication

**In-app purchases:** none


### RevisionSuccess

[App page](https://appshunter.io/ios/app/revisionsuccess-ai-study-app/id6776130065)

Transform your study materials into a personalized learning system with AI. Generate study plans, interactive lessons, quizzes, and flashcards from your own notes and documents. Get instant answers from an AI tutor and master your subjects faster.

**Highlights:** AI-generated study plans, Interactive lessons and flashcards, Smart quizzes with instant feedback, AI tutor for instant answers, Upload personal study materials, Classroom management for teachers

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $12.00 | per month |
| Pro Annual | $99.00 | per year |


## Frequently asked questions

### Is PSU LibX free?

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

### Is RevisionSuccess free?

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

### Do PSU LibX or RevisionSuccess have ads?

Neither PSU LibX nor RevisionSuccess shows ads.

### Which is updated more often, PSU LibX or RevisionSuccess?

PSU LibX ships an update every 4 days, and RevisionSuccess every 9 days. Most recently, PSU LibX was updated on September 28, 2026 and RevisionSuccess on October 2, 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.*