# パブロフくんと学ぶITパスポート vs Oracle Java SE 21 Developer

The clearest difference is price: Oracle Java SE 21 Developer at Free against パブロフくんと学ぶITパスポート's $3.99. Oracle Java SE 21 Developer also leads on update cadence (every 4 days vs every 18 months). パブロフくんと学ぶITパスポート's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Oracle Java SE 21 Developer is free to download; パブロフくんと学ぶITパスポート costs $3.99 up front. Oracle Java SE 21 Developer sells 1 one-off in-app purchase. パブロフくんと学ぶITパスポート asks for nothing beyond the download.

パブロフくんと学ぶITパスポート ships an update every 18 months, Oracle Java SE 21 Developer every 4 days. The most recent releases landed on September 26, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | パブロフくんと学ぶITパスポート | Oracle Java SE 21 Developer |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 4 days** |
| Monetization | Paid | — |
| Size | 40 MB | 201 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Atsuko Yoseda](https://appshunter.io/developer/497317278) | [CHOI SEONGMIN](https://appshunter.io/developer/6772332527) |

## What reviewers say

### パブロフくんと学ぶITパスポート

[App page](https://appshunter.io/ios/app/it/id594212411)

Study for the IT Passport exam with over 1100 past questions. Practice efficiently by focusing on frequently asked or missed questions, and review specific topics or weak areas. This app is designed for convenient study during commutes or breaks.

**Highlights:** 1149 past questions (up to 2021), Focus on frequently asked questions, Review missed questions, Bookmark weak questions for practice, Multiple study modes (topic, random, bookmark, missed), Companion book available

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is パブロフくんと学ぶITパスポート free?

パブロフくんと学ぶITパスポート costs $3.99, with no in-app purchases.

### Is Oracle Java SE 21 Developer free?

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

### Do パブロフくんと学ぶITパスポート or Oracle Java SE 21 Developer have ads?

Neither パブロフくんと学ぶITパスポート nor Oracle Java SE 21 Developer shows ads.

### Which is updated more often, パブロフくんと学ぶITパスポート or Oracle Java SE 21 Developer?

パブロフくんと学ぶITパスポート ships an update every 18 months, and Oracle Java SE 21 Developer every 4 days. Most recently, パブロフくんと学ぶITパスポート was updated on September 26, 2026 and Oracle Java SE 21 Developer on September 22, 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.*