# quang duc vs Phản Xạ Tri Thức

The clearest difference is ads: quang duc at none against Phản Xạ Tri Thức's shown. On price, in-app purchases, device support 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.

## The numbers

| Metric | quang duc | Phản Xạ Tri Thức |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 days |
| Size | 3 MB | 26 MB |
| Requires iOS | **14.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kieu Van Nguyen](https://appshunter.io/developer/1106625278) | [Duy Nguyen](https://appshunter.io/developer/1227361449) |

## What reviewers say

### quang duc

[App page](https://appshunter.io/ios/app/quang-duc/id1580853777)

**Features:** macOS Compatibility

**In-app purchases:** none


### Phản Xạ Tri Thức

[App page](https://appshunter.io/ios/app/phan-xa-tri-thuc/id6767856728)

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

**In-app purchases:** none


## Frequently asked questions

### Is quang duc free?

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

### Is Phản Xạ Tri Thức free?

Phản Xạ Tri Thức is free to download, with no in-app purchases.

### Do quang duc or Phản Xạ Tri Thức have ads?

Phản Xạ Tri Thức shows ads; quang duc does not.

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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.*