# 彩虹单词 vs 同步学英语 |单词卡片

The clearest difference is in-app purchases: 彩虹单词 at none against 同步学英语 |单词卡片's 1. 同步学英语 |单词卡片's advantage is update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 同步学英语 |单词卡片 sells 1 one-off in-app purchase. 彩虹单词 asks for nothing beyond the download.

彩虹单词 ships an update every 2 months, 同步学英语 |单词卡片 every 3 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 彩虹单词 | 同步学英语 |单词卡片 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 24 MB | 42 MB |
| Requires iOS | 18.6 | **17.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Rainbow Forest Co., Ltd](https://appshunter.io/developer/1739974336) | [尧 魏](https://appshunter.io/developer/1658434412) |

## 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


### 同步学英语 |单词卡片

[App page](https://appshunter.io/ios/app/id6737014417)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP 服务 | $0.99 | one-time |


## Frequently asked questions

### Is 彩虹单词 free?

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

### Is 同步学英语 |单词卡片 free?

同步学英语 |单词卡片 is free to download, with in-app purchases available.

### Do 彩虹单词 or 同步学英语 |单词卡片 have ads?

Neither 彩虹单词 nor 同步学英语 |单词卡片 shows ads.

### Which is updated more often, 彩虹单词 or 同步学英语 |单词卡片?

彩虹单词 ships an update every 2 months, and 同步学英语 |单词卡片 every 3 days. Most recently, 彩虹单词 was updated on October 12, 2026 and 同步学英语 |单词卡片 on October 25, 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.*