# Việt MOS vs VMU LIB

The clearest difference is update cadence: VMU LIB at monthly against Việt MOS's every 8 months. VMU LIB also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Việt MOS ships an update every 8 months, VMU LIB monthly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Việt MOS | VMU LIB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (3 ratings)](https://appshunter.io/ios/app/vmu-lib/id6686406579/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | — | Free |
| Size | 84 MB | 53 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Tho Trong Nguyen](https://appshunter.io/developer/1093690555) | [Khang Tran](https://appshunter.io/developer/1709458766) |

## What reviewers say

### Việt MOS

[App page](https://appshunter.io/ios/app/viet-mos/id6503328201)

**In-app purchases:** none


### VMU LIB

[App page](https://appshunter.io/ios/app/vmu-lib/id6686406579)

This application enhances the reading experience by allowing users to easily look up documents, check book loan status, renew loans, and receive notifications about library events. It also provides quick access to digital resources and research articles to optimize learning and research.

**Highlights:** Document lookup, Loan status check, Loan renewal, Event notifications, Digital resource access, Research article access

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

**In-app purchases:** none


## Frequently asked questions

### Is Việt MOS free?

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

### Is VMU LIB free?

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

### Which is updated more often, Việt MOS or VMU LIB?

Việt MOS ships an update every 8 months, and VMU LIB monthly. Most recently, Việt MOS was updated on November 4, 2026 and VMU LIB on October 30, 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.*