# Oracle Java SE 21 Developer vs 歴検2級 過去問・暗記アプリ

The clearest difference is ads: Oracle Java SE 21 Developer at none against 歴検2級 過去問・暗記アプリ's shown. Oracle Java SE 21 Developer also leads on update cadence (every 4 days vs every 2 weeks) and iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Oracle Java SE 21 Developer sells 1 one-off in-app purchase and 歴検2級 過去問・暗記アプリ sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Oracle Java SE 21 Developer ships an update every 4 days, 歴検2級 過去問・暗記アプリ every 2 weeks. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Oracle Java SE 21 Developer | 歴検2級 過去問・暗記アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 201 MB | 42 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) | [Hajime App Lab](https://appshunter.io/developer/1704838092) |

## What reviewers say

### Oracle Java SE 21 Developer

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

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

**In-app purchases (1)**

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


### 歴検2級 過去問・暗記アプリ

[App page](https://appshunter.io/ios/app/2/id6793736734)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $3.99 | one-time |
| 全問題解放 | $3.99 | one-time |
| 広告削除+全問題解放 | $5.99 | one-time |


## Frequently asked questions

### Is Oracle Java SE 21 Developer free?

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

### Is 歴検2級 過去問・暗記アプリ free?

歴検2級 過去問・暗記アプリ is free to download, with in-app purchases available.

### Do Oracle Java SE 21 Developer or 歴検2級 過去問・暗記アプリ have ads?

歴検2級 過去問・暗記アプリ shows ads; Oracle Java SE 21 Developer does not.

### Which is updated more often, Oracle Java SE 21 Developer or 歴検2級 過去問・暗記アプリ?

Oracle Java SE 21 Developer ships an update every 4 days, and 歴検2級 過去問・暗記アプリ every 2 weeks. Most recently, Oracle Java SE 21 Developer was updated on September 22, 2026 and 歴検2級 過去問・暗記アプリ on September 8, 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.*