# eBook Studio vs Java Compiler

The clearest difference is in-app purchases: eBook Studio at none against Java Compiler's 3. eBook Studio also leads on update cadence (every 8 days vs every 3 months) and chart position (#146 vs unranked). On price, ads and device support there is nothing between them.

eBook Studio costs $0.99 and Java Compiler $0.99 up front. Java Compiler sells 3 in-app purchases, starting at $14.99 per month. eBook Studio asks for nothing beyond the download.

eBook Studio ships an update every 8 days, Java Compiler every 3 months. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | eBook Studio | Java Compiler |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Best chart rank | **#146** | — |
| Size | 31 MB | 5 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [株式会社キイロ乃カモ](https://appshunter.io/developer/1796537168) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### eBook Studio

[App page](https://appshunter.io/ios/app/ebook-studio-create-and-publish/id6756200055)

**Currently charting:** #146 Top Paid · Developer Tools (US App Store)

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

**In-app purchases:** none


### Java Compiler

[App page](https://appshunter.io/ios/app/java-compiler-ai-assistant/id6776635648)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30天会员 | $14.99 | per month |
| 360天会员 | $59.99 | per year |
| 终身会员 | $79.99 | one-time |


## Frequently asked questions

### Is eBook Studio free?

eBook Studio costs $0.99, with no in-app purchases.

### Is Java Compiler free?

Java Compiler costs $0.99, and also offers in-app purchases.

### Do eBook Studio or Java Compiler have ads?

Neither eBook Studio nor Java Compiler shows ads.

### Which is updated more often, eBook Studio or Java Compiler?

eBook Studio ships an update every 8 days, and Java Compiler every 3 months. Most recently, eBook Studio was updated on September 21, 2026 and Java Compiler on September 25, 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.*