# 知米背单词 vs wordDNA：词根词缀字典

The clearest difference is ads: 知米背单词 at none against wordDNA：词根词缀字典's shown. 知米背单词 also leads on ratings volume (460 vs 4) and device support (4 vs 1). wordDNA：词根词缀字典's advantage is update cadence (every 6 days vs every 5 weeks) and rating (5.0 vs 4.8). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. 知米背单词 sells 12 one-off in-app purchases and wordDNA：词根词缀字典 sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

wordDNA：词根词缀字典 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 知米背单词 has 460 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 97% of 知米背单词's written reviews are positive against 100% of wordDNA：词根词缀字典's.

知米背单词 ships an update every 5 weeks, wordDNA：词根词缀字典 every 6 days. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 知米背单词 | wordDNA：词根词缀字典 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (460 ratings)](https://appshunter.io/ios/app/app/id893122685/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/worddna/id6769062051/reviews)** |
| Number of ratings | **460** | 4 |
| Positive reviews | 96.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 147 MB | 264 MB |
| Requires iOS | **9.0** | 17.5 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BlueBrain Educational Technology Co., Ltd.](https://appshunter.io/developer/893122688) | [峰 潘](https://appshunter.io/developer/1823196275) |

## What reviewers say

### 知米背单词

[App page](https://appshunter.io/ios/app/app/id893122685)

This app offers a fun and effective way to memorize English vocabulary, with seven mnemonic methods and scientific review techniques. It also includes grammar lessons and reading practice with authentic materials.

**Highlights:** Seven mnemonic methods for memorization, Scientific review in context, Comprehensive study data statistics, 10-hour grammar mastery, Practice with authentic reading materials, Daily bilingual news and classic books

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 600知米粒 | $0.99 | one-time |
| 词根词缀助记1个月 | $0.99 | one-time |
| 单词助记服务(1个月) | $1.99 | one-time |
| 1800知米粒 | $2.99 | one-time |
| 单词配图3个月 | $2.99 | one-time |
| 词根词缀助记3个月 | $2.99 | one-time |
| 3000知米粒 | $3.99 | one-time |
| 6800知米粒 | $9.99 | one-time |
| 单词助记服务(12个月) | $9.99 | one-time |
| 单词配图永久 | $12.99 | one-time |
| 词根词缀助记永久 | $12.99 | one-time |
| 单词助记服务(永久) | $12.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient word learning
- 💡 Helpful word association features
- 🗣️ Good pronunciation examples
- 📚 Extensive word library

**What reviewers complain about**

- 🐛 Occasional bugs or crashes
- 💰 Some features require paid subscription
- 🖥️ Lack of iPad support

**Reported bugs**

- Login issues on certain devices
- Inconsistent word definitions

**Requested features**

- Improved multi-device synchronization
- More customization options
- Integration with other learning resources


### wordDNA：词根词缀字典

[App page](https://appshunter.io/ios/app/worddna/id6769062051)

This app helps users understand English vocabulary by breaking down words into their roots, prefixes, and suffixes. It provides bilingual explanations, pronunciation, and usage examples, with offline access and basic learning tools included for free. Advanced features and content are available through an optional subscription.

**Highlights:** Bilingual word explanations, Etymology, roots, prefixes, suffixes, Pronunciation and usage examples, Offline dictionary lookup, Favorites and saved words, Basic quiz and review tools

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenEtymology Plus Monthly | $2.99 | per month |
| OpenEtymology Plus Yearly | $17.99 | per year |
| OpenEtymology Plus Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is 知米背单词 free?

知米背单词 is free to download, with in-app purchases available.

### Is wordDNA：词根词缀字典 free?

wordDNA：词根词缀字典 is free to download, with in-app purchases available.

### Which has better reviews, 知米背单词 or wordDNA：词根词缀字典?

wordDNA：词根词缀字典 is rated higher. 知米背单词 averages 4.8 out of 5 from 460 ratings, while wordDNA：词根词缀字典 averages 5.0 from 4 ratings.

### Do 知米背单词 or wordDNA：词根词缀字典 have ads?

wordDNA：词根词缀字典 shows ads; 知米背单词 does not.

### Which is updated more often, 知米背单词 or wordDNA：词根词缀字典?

知米背单词 ships an update every 5 weeks, and wordDNA：词根词缀字典 every 6 days. Most recently, 知米背单词 was updated on October 18, 2026 and wordDNA：词根词缀字典 on October 7, 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.*