# 知米背单词 vs 词根背单词

The clearest difference is in-app purchases: 词根背单词 at none against 知米背单词's 12. 知米背单词's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 39 months). On price, rating, review sentiment and device support there is nothing between them.

Both are free to download. 知米背单词 sells 12 one-off in-app purchases. 词根背单词 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for 知米背单词 against 4.8 for 词根背单词. That said, the two scores are not equally well evidenced: 知米背单词 has 460 ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 97% of 知米背单词's written reviews are positive against 93% of 词根背单词's.

知米背单词 ships an update every 5 weeks, 词根背单词 every 39 months. The most recent releases landed on August 12, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 知米背单词 | 词根背单词 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (460 ratings)](https://appshunter.io/ios/app/app/id893122685/reviews) | [4.8 (17 ratings)](https://appshunter.io/ios/app/id1387762387/reviews) |
| Number of ratings | **460** | 17 |
| Positive reviews | **97.2% of reviews** | 93.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 39 months |
| Monetization | Free with in-app purchases | — |
| Size | 147 MB | 5 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BlueBrain Educational Technology Co., Ltd.](https://appshunter.io/developer/893122688) | [静俐 张](https://appshunter.io/developer/447014629) |

## 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


### 词根背单词

[App page](https://appshunter.io/ios/app/id1387762387)

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

**In-app purchases:** none


## 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 词根背单词 free?

词根背单词 is free to download, with no in-app purchases.

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

知米背单词 and 词根背单词 are both rated 4.8 out of 5 on the App Store, from 460 and 17 ratings respectively.

### Do 知米背单词 or 词根背单词 have ads?

词根背单词 shows ads; 知米背单词 does not.

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

知米背单词 ships an update every 5 weeks, and 词根背单词 every 39 months. Most recently, 知米背单词 was updated on August 12, 2026 and 词根背单词 on September 20, 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.*