# JavaScript Manual vs Java Prep

The clearest difference is in-app purchases: JavaScript Manual at none against Java Prep's 3. Java Prep's advantage is update cadence (every 6 weeks vs every 31 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Java Prep sells 3 in-app purchases, starting at $0.99 per month. JavaScript Manual asks for nothing beyond the download.

JavaScript Manual ships an update every 31 months, Java Prep every 6 weeks. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | JavaScript Manual | Java Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/javascript-manual/id6476828541/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 34 MB | 17 MB |
| Requires iOS | **15.0** | 16 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Hua Yang](https://appshunter.io/developer/1497666891) | [嘉 邱](https://appshunter.io/developer/1708883953) |

## What reviewers say

### JavaScript Manual

[App page](https://appshunter.io/ios/app/javascript-manual/id6476828541)

An offline, ad-free guide to JavaScript, covering its core guide, built-in objects, and Web API. Access comprehensive documentation without an internet connection.

**Highlights:** JavaScript guide, Built-in objects, Web API documentation, Offline access, Ad-free experience

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

**In-app purchases:** none


### Java Prep

[App page](https://appshunter.io/ios/app/java-prep/id6748876631)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| Quarterly Membership | $2.99 | per 3 months |
| Semi-Annual Membership | $5.99 | per 6 months |


## Frequently asked questions

### Is JavaScript Manual free?

JavaScript Manual is free to download, with no in-app purchases.

### Is Java Prep free?

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

### Do JavaScript Manual or Java Prep have ads?

Neither JavaScript Manual nor Java Prep shows ads.

### Which is updated more often, JavaScript Manual or Java Prep?

JavaScript Manual ships an update every 31 months, and Java Prep every 6 weeks. Most recently, JavaScript Manual was updated on October 7, 2026 and Java Prep on October 2, 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.*