# eUTC vs Thầy Trò

The clearest difference is in-app purchases: eUTC at none against Thầy Trò's 2. eUTC also leads on iOS requirement (15.5 vs 18.6). Thầy Trò's advantage is update cadence (every 2 weeks vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Thầy Trò sells 2 in-app purchases, starting at $1.99 per month. eUTC asks for nothing beyond the download.

eUTC ships an update monthly, Thầy Trò every 2 weeks. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | eUTC | Thầy Trò |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 76 MB | 25 MB |
| Requires iOS | **15.5** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UNIVERSITY OF TRANSPORT AND COMMUNICATIONS](https://appshunter.io/developer/1550228970) | [MI PHAM VAN](https://appshunter.io/developer/1832641861) |

## What reviewers say

### eUTC

[App page](https://appshunter.io/ios/app/eutc/id6447959887)

**Features:** macOS Compatibility

**In-app purchases:** none


### Thầy Trò

[App page](https://appshunter.io/ios/app/thay-tro/id6761396570)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Plan | $1.99 | per month |
| 1-Year Plan | $14.99 | per year |


## Frequently asked questions

### Is eUTC free?

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

### Is Thầy Trò free?

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

### Do eUTC or Thầy Trò have ads?

Neither eUTC nor Thầy Trò shows ads.

### Which is updated more often, eUTC or Thầy Trò?

eUTC ships an update monthly, and Thầy Trò every 2 weeks. Most recently, eUTC was updated on October 11, 2026 and Thầy Trò on October 6, 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.*