# Java Mock Free vs Java SE 21 Developer

The clearest difference is in-app purchases: Java Mock Free at none against Java SE 21 Developer's 1. Java Mock Free also leads on iOS requirement (8.0 vs 15.1). Java SE 21 Developer's advantage is update cadence (weekly vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Java SE 21 Developer sells 1 one-off in-app purchase. Java Mock Free asks for nothing beyond the download.

Java Mock Free ships an update every 3 weeks, Java SE 21 Developer weekly. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Java Mock Free | Java SE 21 Developer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 5 MB | 203 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HARIKRISHNA VALLAKATLA](https://appshunter.io/developer/1024902607) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### Java Mock Free

[App page](https://appshunter.io/ios/app/java-mock-free/id1031093559)

Practice Java programming questions and prepare for exams and interviews. Features include bookmarking, automatic saving of strong/weak areas, and sharing options. Quizzes range from 25 to 250 questions.

**Highlights:** Offline functionality, Mock Java exams, Bookmark favorite questions, Automatic weak/strong question saving, Share questions with friends, Multiple quiz sizes (25-250 questions), Quiz timer

**Features:** macOS Compatibility

**In-app purchases:** none


### Java SE 21 Developer

[App page](https://appshunter.io/ios/app/java-se-21-developer/id6785110070)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is Java Mock Free free?

Java Mock Free is free to download, with no in-app purchases.

### Is Java SE 21 Developer free?

Java SE 21 Developer is free to download, with in-app purchases available.

### Do Java Mock Free or Java SE 21 Developer have ads?

Neither Java Mock Free nor Java SE 21 Developer shows ads.

### Which is updated more often, Java Mock Free or Java SE 21 Developer?

Java Mock Free ships an update every 3 weeks, and Java SE 21 Developer weekly. Most recently, Java Mock Free was updated on November 2, 2026 and Java SE 21 Developer on October 28, 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.*