# PSU LibX vs LANGO

The clearest difference is in-app purchases: PSU LibX at none against LANGO's 5. PSU LibX also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. LANGO sells 5 in-app purchases, starting at $4.99 per month. PSU LibX asks for nothing beyond the download.

PSU LibX ships an update every 4 days, LANGO weekly. The most recent releases landed on September 28, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | PSU LibX | LANGO |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Free | — |
| Size | 50 MB | 283 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PRINCE OF SONGKLA UNIVERSITY](https://appshunter.io/developer/1456089991) | [CODEWORK](https://appshunter.io/developer/1888701437) |

## 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


### LANGO

[App page](https://appshunter.io/ios/app/langod/id6761912955)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LANGO:D Basic | $4.99 | per month |
| LANGO:D Pro | $9.99 | per month |
| 5,000 Character Credits | $1.99 | one-time |
| 15,000 Character Credits | $2.99 | one-time |
| 40,000 Character Credits | $5.99 | one-time |


## Frequently asked questions

### Is PSU LibX free?

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

### Is LANGO free?

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

### Do PSU LibX or LANGO have ads?

Neither PSU LibX nor LANGO shows ads.

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

PSU LibX ships an update every 4 days, and LANGO weekly. Most recently, PSU LibX was updated on September 28, 2026 and LANGO on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*