# 1Z0 vs Java SE 21 Developer

The clearest difference is update cadence: Java SE 21 Developer at weekly against 1Z0's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 1Z0 sells 2 one-off in-app purchases and Java SE 21 Developer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

1Z0 ships an update every 3 weeks, Java SE 21 Developer weekly. Both last shipped on November 13, 2026.

## The numbers

| Metric | 1Z0 | Java SE 21 Developer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 45 MB | 233 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EXAMCERT PTY LTD](https://appshunter.io/developer/1830664214) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### 1Z0

[App page](https://appshunter.io/ios/app/1z0-808-java-se-8-exam-2026/id6758898227)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 200 AI Credits | $1.99 | one-time |
| Unlock Premium | $5.99 | one-time |


### 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 1Z0 free?

1Z0 is free to download, with in-app purchases available.

### Is Java SE 21 Developer free?

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

### Do 1Z0 or Java SE 21 Developer have ads?

Neither 1Z0 nor Java SE 21 Developer shows ads.

### Which is updated more often, 1Z0 or Java SE 21 Developer?

1Z0 ships an update every 3 weeks, and Java SE 21 Developer weekly. Most recently, 1Z0 was updated on November 13, 2026 and Java SE 21 Developer on November 13, 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.*