# 彩虹单词 vs 阿布背单词

The clearest difference is in-app purchases: 彩虹单词 at none against 阿布背单词's 3. 阿布背单词's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (16.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. 阿布背单词 sells 3 in-app purchases, starting at $0.99 per 7 days. 彩虹单词 asks for nothing beyond the download.

彩虹单词 ships an update every 2 months, 阿布背单词 every 3 weeks. The most recent releases landed on September 26, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | 彩虹单词 | 阿布背单词 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (6 ratings)](https://appshunter.io/ios/app/ai/id6747030390/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 24 MB | 6 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rainbow Forest Co., Ltd](https://appshunter.io/developer/1739974336) | [Xin Chen](https://appshunter.io/developer/425936137) |

## What reviewers say

### 彩虹单词

[App page](https://appshunter.io/ios/app/id6502644844)

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

**In-app purchases:** none


### 阿布背单词

[App page](https://appshunter.io/ios/app/ai/id6747030390)

Learn languages with engaging stories and an AI tutor. This app uses narrative memory techniques to make vocabulary acquisition fun and effective. Practice speaking and writing with AI feedback to improve fluency and accuracy.

**Highlights:** Story-based vocabulary memorization, AI foreign language tutor, AI deep word analysis, Interactive reading and dictation, Exam and daily phrase libraries, Synonym comparison practice

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $0.99 | per 7 days |
| Monthly Premium | $2.99 | per month |
| 包年VIP会员 | $19.99 | per year |


## Frequently asked questions

### Is 彩虹单词 free?

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

### Is 阿布背单词 free?

阿布背单词 is free to download, with in-app purchases available.

### Do 彩虹单词 or 阿布背单词 have ads?

Neither 彩虹单词 nor 阿布背单词 shows ads.

### Which is updated more often, 彩虹单词 or 阿布背单词?

彩虹单词 ships an update every 2 months, and 阿布背单词 every 3 weeks. Most recently, 彩虹单词 was updated on September 26, 2026 and 阿布背单词 on August 24, 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.*