# 流利鸭 vs Delta单词

The clearest difference is in-app purchases: Delta单词 at none against 流利鸭's 5. 流利鸭's advantage is iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. 流利鸭 sells 5 one-off in-app purchases. Delta单词 asks for nothing beyond the download.

## The numbers

| Metric | 流利鸭 | Delta单词 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Daily |
| Size | 56 MB | 180 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Guangzhou Don Quixote Education Technology Co., Ltd.](https://appshunter.io/developer/1135753513) | [田丰 何](https://appshunter.io/developer/1674464316) |

## What reviewers say

### 流利鸭

[App page](https://appshunter.io/ios/app/id6740518764)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 口语AI月度会员 | $14.99 | one-time |
| 口语AI季度会员 | $29.99 | one-time |
| 口语AI半年度会员 | $39.99 | one-time |
| 口语AI年度会员 | $59.99 | one-time |
| 口语AI超级会员 | $99.99 | one-time |


### Delta单词

[App page](https://appshunter.io/ios/app/delta/id6744654342)

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

**In-app purchases:** none


## Frequently asked questions

### Is 流利鸭 free?

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

### Is Delta单词 free?

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

### Do 流利鸭 or Delta单词 have ads?

Neither 流利鸭 nor Delta单词 shows ads.

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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.*