# 知米背单词 vs wordDNA

The clearest difference is ads: 知米背单词 at none against wordDNA's shown. 知米背单词 also leads on ratings volume (468 vs 5) and device support (4 vs 1). wordDNA's advantage is update cadence (every 6 days vs every 5 weeks). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. 知米背单词 sells 12 one-off in-app purchases and wordDNA sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

wordDNA 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 468 ratings behind it against 5, 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's.

知米背单词 ships an update every 5 weeks, wordDNA every 6 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 知米背单词 | wordDNA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (468 ratings)](https://appshunter.io/ios/app/app/id893122685/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/worddna-etymology-dictionary/id6769062051/reviews)** |
| Number of ratings | **468** | 5 |
| 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 | 89 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

[App page](https://appshunter.io/ios/app/worddna-etymology-dictionary/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 | $0.99 | per month |
| OpenEtymology Plus Yearly | $6.99 | per year |
| OpenEtymology Plus Lifetime | $14.99 | 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 free?

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

### Which has better reviews, 知米背单词 or wordDNA?

wordDNA is rated higher. 知米背单词 averages 4.8 out of 5 from 468 ratings, while wordDNA averages 5.0 from 5 ratings.

### Do 知米背单词 or wordDNA have ads?

wordDNA shows ads; 知米背单词 does not.

### Which is updated more often, 知米背单词 or wordDNA?

知米背单词 ships an update every 5 weeks, and wordDNA every 6 days. Most recently, 知米背单词 was updated on October 22, 2026 and wordDNA on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*