# Onllearning 4.0 vs Duy Tân

The clearest difference is device support: Onllearning 4.0 at 3 against Duy Tân's —. 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.

## The numbers

| Metric | Onllearning 4.0 | Duy Tân |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 2 weeks | — |
| Size | 66 MB | 14 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Binh Nguyen](https://appshunter.io/developer/1659967996) | [HOUSE3D COMPANY LIMITED](https://appshunter.io/developer/1627401554) |

## What reviewers say

### Onllearning 4.0

[App page](https://appshunter.io/ios/app/onllearning-40/id1592060835)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duy Tân

[App page](https://appshunter.io/ios/app/duy-tan/id6446834018)

**In-app purchases:** none


## Frequently asked questions

### Is Onllearning 4.0 free?

Onllearning 4.0 is free to download, with no in-app purchases.

### Is Duy Tân free?

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

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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.*