# 易错词库 vs 见证者教练

The clearest difference is in-app purchases: 见证者教练 at none against 易错词库's 1. 见证者教练 also leads on update cadence (daily vs every 11 days). 易错词库's advantage is iOS requirement (16.6 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. 易错词库 sells 1 one-off in-app purchase. 见证者教练 asks for nothing beyond the download.

易错词库 ships an update every 11 days, 见证者教练 daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 易错词库 | 见证者教练 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 34 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [尧 魏](https://appshunter.io/developer/1658434412) | [笑天 刘](https://appshunter.io/developer/1845977493) |

## What reviewers say

### 易错词库

[App page](https://appshunter.io/ios/app/id6450763094)

This app helps students eliminate errors in Chinese characters, pinyin, and idioms. It offers a comprehensive dictionary of commonly mistaken words and provides learning materials from educational websites to boost Chinese language proficiency for exams.

**Highlights:** 3000+ common error words dictionary, Curated educational materials, High-frequency updates, Authoritative dictionary definitions, Save and favorite words for review

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

**In-app purchases (1)**

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


### 见证者教练

[App page](https://appshunter.io/ios/app/id6766876720)

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

**In-app purchases:** none


## Frequently asked questions

### Is 易错词库 free?

易错词库 is free to download, with in-app purchases available.

### Is 见证者教练 free?

见证者教练 is free to download, with no in-app purchases.

### Do 易错词库 or 见证者教练 have ads?

Neither 易错词库 nor 见证者教练 shows ads.

### Which is updated more often, 易错词库 or 见证者教练?

易错词库 ships an update every 11 days, and 见证者教练 daily. Most recently, 易错词库 was updated on November 3, 2026 and 见证者教练 on October 31, 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.*