# 知米背单词 vs HelloWord

The clearest difference is update cadence: HelloWord at every 9 days against 知米背单词's every 5 weeks. 知米背单词's advantage is review sentiment (97% vs 83%) and iOS requirement (9.0 vs 18.0). On price, ads, 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 HelloWord sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

知米背单词 ships an update every 5 weeks, HelloWord every 9 days. The most recent releases landed on August 12, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 知米背单词 | HelloWord |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (460 ratings)](https://appshunter.io/ios/app/app/id893122685/reviews)** | — |
| Number of ratings | **460** | — |
| Positive reviews | **97.2% of reviews** | 82.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 147 MB | 40 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [BlueBrain Educational Technology Co., Ltd.](https://appshunter.io/developer/893122688) | [轩 刘](https://appshunter.io/developer/1554407305) |

## 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


### HelloWord

[App page](https://appshunter.io/ios/app/helloword/id6756203867)

This app helps you learn vocabulary on your Apple Watch, even offline. It offers instant pronunciation, example sentences, and quick word switching with gestures. It's designed for independent use without needing your iPhone nearby.

**Highlights:** Independent Apple Watch operation, Offline pronunciation, Example sentence viewing, Gesture-based word switching, Supports iPhone and iPad

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Word+ 月度会员 | $0.99 | per month |
| Word+ 年度会员 | $7.99 | per year |


## 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 HelloWord free?

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

### Do 知米背单词 or HelloWord have ads?

Neither 知米背单词 nor HelloWord shows ads.

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

知米背单词 ships an update every 5 weeks, and HelloWord every 9 days. Most recently, 知米背单词 was updated on August 12, 2026 and HelloWord on September 26, 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.*