# 六级CET vs 小刺蝟的生日派對

The clearest difference is in-app purchases: 小刺蝟的生日派對 at none against 六级CET's 1. 六级CET's advantage is iOS requirement (11.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 六级CET sells 1 one-off in-app purchase. 小刺蝟的生日派對 asks for nothing beyond the download.

六级CET ships an update every 3 weeks, 小刺蝟的生日派對 every 5 weeks. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 六级CET | 小刺蝟的生日派對 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/cet-6hd/id688093406/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 97 MB | 261 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [水萍 林](https://appshunter.io/developer/664555715) | [Over Paradigm Tech. Inc.](https://appshunter.io/developer/373739560) |

## What reviewers say

### 六级CET

[App page](https://appshunter.io/ios/app/cet-6hd/id688093406)

This app uses the Ebbinghaus forgetting curve and user interaction to optimize vocabulary learning. It adapts study and review schedules based on individual memory patterns for long-term retention. All content is available offline.

**Highlights:** Ebbinghaus memory curve integration, Personalized learning schedules, Offline access to all content, Interactive learning methods, Focus on long-term memory retention

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 六级词汇完整版 | $2.99 | one-time |


### 小刺蝟的生日派對

[App page](https://appshunter.io/ios/app/id1314827664)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 六级CET free?

六级CET is free to download, with in-app purchases available.

### Is 小刺蝟的生日派對 free?

小刺蝟的生日派對 is free to download, with no in-app purchases.

### Do 六级CET or 小刺蝟的生日派對 have ads?

Neither 六级CET nor 小刺蝟的生日派對 shows ads.

### Which is updated more often, 六级CET or 小刺蝟的生日派對?

六级CET ships an update every 3 weeks, and 小刺蝟的生日派對 every 5 weeks. Most recently, 六级CET was updated on October 12, 2026 and 小刺蝟的生日派對 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.*