# 四级单词达人 vs LED Chat

The clearest difference is update cadence: LED Chat at every 4 days against 四级单词达人's every 3 months. 四级单词达人's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 四级单词达人 sells 1 one-off in-app purchase and LED Chat sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

四级单词达人 ships an update every 3 months, LED Chat every 4 days. The most recent releases landed on August 22, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 四级单词达人 | LED Chat |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 38 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [摇摇 章](https://appshunter.io/developer/1570032236) | [文娟 唐](https://appshunter.io/developer/1870722016) |

## What reviewers say

### 四级单词达人

[App page](https://appshunter.io/ios/app/ai/id6484273453)

This app simplifies vocabulary learning for the CET-4 exam. It uses AI to recommend words and track your memory, creating personalized study plans. A daily word widget keeps you on track.

**Highlights:** AI-powered word recommendations, Latest CET-4 vocabulary list, Daily word widget, Memory tracking, Personalized study plans

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 大学英语四级单词达人vip会员 | $0.99 | one-time |


### LED Chat

[App page](https://appshunter.io/ios/app/led-chat-led-bullet-comments/id6758072575)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock function | $9.99 | one-time |


## Frequently asked questions

### Is 四级单词达人 free?

四级单词达人 is free to download, with in-app purchases available.

### Is LED Chat free?

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

### Do 四级单词达人 or LED Chat have ads?

Neither 四级单词达人 nor LED Chat shows ads.

### Which is updated more often, 四级单词达人 or LED Chat?

四级单词达人 ships an update every 3 months, and LED Chat every 4 days. Most recently, 四级单词达人 was updated on August 22, 2026 and LED Chat on September 17, 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.*