# Javascript教程 vs Ebook Formats Converter

The clearest difference is ads: Ebook Formats Converter at none against Javascript教程's shown. Ebook Formats Converter also leads on iOS requirement (12.0 vs 15.0). Javascript教程's advantage is review sentiment (100% vs 92%). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Javascript教程 sells 1 one-off in-app purchase and Ebook Formats Converter sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on June 20, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Javascript教程 | Ebook Formats Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/javascript/id1434963430/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 91.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 67 MB | 52 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [宏斌 樊](https://appshunter.io/developer/1452129040) | [Meitian Trading](https://appshunter.io/developer/1549616114) |

## What reviewers say

### Javascript教程

[App page](https://appshunter.io/ios/app/javascript/id1434963430)

Learn Javascript programming with this app, covering fundamentals, object-oriented concepts, and advanced topics. It includes a Q&A section for technical points and a comprehensive test bank to assess your knowledge. Features like bookmarking, image zooming, and adjustable font sizes enhance the learning experience.

**Highlights:** Javascript programming fundamentals, Object-oriented and advanced concepts, Technical Q&A, Test question bank, Bookmark last read position, Image zoom and font resizing, Swipe navigation and orientation support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 去除广告插件 | $3.99 | one-time |


### Ebook Formats Converter

[App page](https://appshunter.io/ios/app/ebook-formats-converter/id6446448731)

Easily convert ebooks between numerous formats like EPUB, MOBI, and PDF. Organize your library by editing metadata and access past conversions. Download or export files in batches with a user-friendly interface.

**Highlights:** Multiple ebook format conversion, Metadata editing, Conversion history, Batch download and export, User-friendly interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP月会员 | $2.99 | per month |
| VIP季会员 | $4.99 | per 3 months |
| VIP年会员 | $7.99 | per year |


## Frequently asked questions

### Is Javascript教程 free?

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

### Is Ebook Formats Converter free?

Ebook Formats Converter is free to download, with in-app purchases available.

### Do Javascript教程 or Ebook Formats Converter have ads?

Javascript教程 shows ads; Ebook Formats Converter does not.

### Which is updated more often, Javascript教程 or Ebook Formats Converter?

Javascript教程 ships an update every 4 months, and Ebook Formats Converter every 4 months. Most recently, Javascript教程 was updated on June 20, 2026 and Ebook Formats Converter on September 16, 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.*