# FormatX vs 四级单词达人

The clearest difference is rating: 四级单词达人 at 5.0 against FormatX's 4.6. 四级单词达人 also leads on iOS requirement (11.0 vs 17.0). FormatX's advantage is monetization model (free vs free with in-app purchases) and ratings volume (10 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. FormatX sells 3 in-app purchases, starting at $0.29 per 7 days and 四级单词达人 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 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: FormatX has 10 ratings behind it against 1, so its average is the more settled of the two.

FormatX ships an update every 2 months, 四级单词达人 every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | FormatX | 四级单词达人 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/formatx-video-audio-converter/id6468912985/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6484273453/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 94 MB | 11 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [阳 刘](https://appshunter.io/developer/1616314142) | [摇摇 章](https://appshunter.io/developer/1570032236) |

## What reviewers say

### FormatX

[App page](https://appshunter.io/ios/app/formatx-video-audio-converter/id6468912985)

This app is a comprehensive tool for converting and editing video, audio, and image files. It offers features like compression, extraction, merging, and format adjustments for a wide range of media types.

**Highlights:** Video format conversion, Audio format conversion, Image format conversion, Audio extraction from video, Video compression, Video and audio editing, GIF creation from video

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week | $0.29 | per 7 days |
| 1 Month | $0.99 | per month |
| 1 Year | $9.99 | per year |


### 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 |


## Frequently asked questions

### Is FormatX free?

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

### Is 四级单词达人 free?

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

### Which has better reviews, FormatX or 四级单词达人?

四级单词达人 is rated higher. FormatX averages 4.6 out of 5 from 10 ratings, while 四级单词达人 averages 5.0 from 1 ratings.

### Do FormatX or 四级单词达人 have ads?

Neither FormatX nor 四级单词达人 shows ads.

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

FormatX ships an update every 2 months, and 四级单词达人 every 3 months. Most recently, FormatX was updated on November 3, 2026 and 四级单词达人 on November 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.*