# 四级CET vs 绕口令大全

The clearest difference is review sentiment: 四级CET at 86% against 绕口令大全's 50%. 四级CET also leads on ads (none vs shown) and iOS requirement (11.0 vs 15.0). 绕口令大全's advantage is in-app purchases (none vs 1) and update cadence (fortnightly vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. 四级CET sells 1 one-off in-app purchase. 绕口令大全 asks for nothing beyond the download.

四级CET ships an update every 5 weeks, 绕口令大全 fortnightly. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 四级CET | 绕口令大全 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/cet-4hd/id687805235/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **85.7% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 103 MB | 15 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [水萍 林](https://appshunter.io/developer/664555715) | [浩杰 姬](https://appshunter.io/developer/1514456091) |

## What reviewers say

### 四级CET

[App page](https://appshunter.io/ios/app/cet-4hd/id687805235)

This reference app uses the Ebbinghaus forgetting curve and user interaction to optimize vocabulary learning for long-term memory. All content is available offline, making it accessible on various Apple devices.

**Highlights:** Ebbinghaus forgetting curve integration, User interaction for personalized learning, Optimized learning and review schedule, Long-term memory enhancement, Offline content access, Supports iPhone, iPod touch, and iPad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 四级词汇完整版 | $2.99 | one-time |


### 绕口令大全

[App page](https://appshunter.io/ios/app/id1600433336)

This app offers a rich collection of traditional Chinese tongue twisters, also known as "rao kou ling." It's designed to help users improve their pronunciation, fluency, and speaking skills through fun and engaging language exercises. The interface is simple and easy to navigate, providing an accessible way to practice.

**Highlights:** Extensive collection of tongue twisters, Improves pronunciation and fluency, Simple and intuitive interface, Completely free to use, Engaging language practice

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 四级CET free?

四级CET is free to download, with in-app purchases available.

### Is 绕口令大全 free?

绕口令大全 is free to download, with no in-app purchases.

### Do 四级CET or 绕口令大全 have ads?

绕口令大全 shows ads; 四级CET does not.

### Which is updated more often, 四级CET or 绕口令大全?

四级CET ships an update every 5 weeks, and 绕口令大全 fortnightly. Most recently, 四级CET was updated on November 1, 2026 and 绕口令大全 on November 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.*