# 四级单词达人 vs API Event Notify

The clearest difference is in-app purchases: API Event Notify at none against 四级单词达人's 1. 四级单词达人's advantage is update cadence (every 3 months vs every 6 months) and iOS requirement (11.0 vs 15.6). On price, review sentiment, ads 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. API Event Notify asks for nothing beyond the download.

四级单词达人 ships an update every 3 months, API Event Notify every 6 months. The most recent releases landed on August 22, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | 四级单词达人 | API Event Notify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/api-event-notify/id6748003043/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 11 MB | 2 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [摇摇 章](https://appshunter.io/developer/1570032236) | [凤明 李](https://appshunter.io/developer/1805559726) |

## 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 |


### API Event Notify

[App page](https://appshunter.io/ios/app/api-event-notify/id6748003043)

Receive real-time event notifications from third-party systems directly to your device. Manage notification statuses and access comprehensive API documentation for seamless integration. Ideal for developers and operations engineers needing flexible message push solutions.

**Highlights:** Real-time push notifications, API key management, Notification status management, Complete API documentation, Multi-language support, RESTful API calls

**In-app purchases:** none


## 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 API Event Notify free?

API Event Notify is free to download, with no in-app purchases.

### Do 四级单词达人 or API Event Notify have ads?

Neither 四级单词达人 nor API Event Notify shows ads.

### Which is updated more often, 四级单词达人 or API Event Notify?

四级单词达人 ships an update every 3 months, and API Event Notify every 6 months. Most recently, 四级单词达人 was updated on August 22, 2026 and API Event Notify on July 4, 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.*