# 咔咔背单词 vs soso背单词

The clearest difference is review sentiment: soso背单词 at 100% against 咔咔背单词's 50%. soso背单词 also leads on update cadence (every 2 weeks vs every 4 weeks) and ratings volume (9 vs 3). 咔咔背单词's advantage is rating (5.0 vs 4.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. 咔咔背单词 sells 5 one-off in-app purchases and soso背单词 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

咔咔背单词 holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 3 and 9 respectively. Written reviews complicate that: 50% of 咔咔背单词's written reviews are positive against 100% of soso背单词's, so the app with the better star average is not the one people write more warmly about.

咔咔背单词 ships an update every 4 weeks, soso背单词 every 2 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 咔咔背单词 | soso背单词 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id6743207138/reviews)** | [4.6 (9 ratings)](https://appshunter.io/ios/app/soso/id6744951748/reviews) |
| Number of ratings | 3 | **9** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 265 MB | 222 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Keyanqi Information Technology Co., Ltd.](https://appshunter.io/developer/1801920078) | [太空阶梯网络科技](https://appshunter.io/developer/1810120913) |

## What reviewers say

### 咔咔背单词

[App page](https://appshunter.io/ios/app/id6743207138)

This app offers a unique method for memorizing vocabulary by categorizing words based on familiarity. It incorporates various learning modes, engaging games, and extensive reading materials to make language acquisition effective and enjoyable for learners of all levels.

**Highlights:** Unique familiarity-based memorization method, Multiple learning modes and fun games, Natural phonics and pronunciation training, Customizable word lists and sharing, PDF export for offline study, Extensive reading materials with integrated vocabulary

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1元试用 | $0.99 | one-time |
| 咔咔积分 | $1.99 | one-time |
| 一年会员 | $9.99 | one-time |
| 一年制会员 | $9.99 | one-time |
| 永久会员 | $14.99 | one-time |


### soso背单词

[App page](https://appshunter.io/ios/app/soso/id6744951748)

This app uses AI and the Ebbinghaus forgetting curve to create personalized daily study plans for vocabulary. It offers a vast library of words from popular books and exams, enhanced with images and example sentences to aid memorization and understanding.

**Highlights:** AI-driven personalized study plans, Ebbinghaus forgetting curve integration, Massive vocabulary library (20,000 words), Visual learning with images, Contextual learning with example sentences, Efficient and engaging vocabulary acquisition

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SOSOVIP 3个月会员 | $3.99 | one-time |
| SOSOVIP 1年会员 | $8.99 | one-time |
| SOSOVIP 永久会员 | $11.99 | one-time |


## Frequently asked questions

### Is 咔咔背单词 free?

咔咔背单词 is free to download, with in-app purchases available.

### Is soso背单词 free?

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

### Which has better reviews, 咔咔背单词 or soso背单词?

咔咔背单词 is rated higher. 咔咔背单词 averages 5.0 out of 5 from 3 ratings, while soso背单词 averages 4.6 from 9 ratings.

### Do 咔咔背单词 or soso背单词 have ads?

Neither 咔咔背单词 nor soso背单词 shows ads.

### Which is updated more often, 咔咔背单词 or soso背单词?

咔咔背单词 ships an update every 4 weeks, and soso背单词 every 2 weeks. Most recently, 咔咔背单词 was updated on November 4, 2026 and soso背单词 on November 5, 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.*