# パブロフくんと学ぶITパスポート vs ChallengeAddition&Subtraction

The clearest difference is price: ChallengeAddition&Subtraction at Free against パブロフくんと学ぶITパスポート's $3.99. ChallengeAddition&Subtraction also leads on update cadence (fortnightly vs every 18 months) and iOS requirement (11.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

ChallengeAddition&Subtraction is free to download; パブロフくんと学ぶITパスポート costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

パブロフくんと学ぶITパスポート ships an update every 18 months, ChallengeAddition&Subtraction fortnightly. The most recent releases landed on August 27, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | パブロフくんと学ぶITパスポート | ChallengeAddition&Subtraction |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 40 MB | 58 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Atsuko Yoseda](https://appshunter.io/developer/497317278) | [koichi kodama](https://appshunter.io/developer/1679265192) |

## 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


### ChallengeAddition&Subtraction

[App page](https://appshunter.io/ios/app/challengeaddition-and-subtraction/id6446822143)

**In-app purchases:** none


## 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 ChallengeAddition&Subtraction free?

ChallengeAddition&Subtraction is free to download, with no in-app purchases.

### Do パブロフくんと学ぶITパスポート or ChallengeAddition&Subtraction have ads?

Neither パブロフくんと学ぶITパスポート nor ChallengeAddition&Subtraction shows ads.

### Which is updated more often, パブロフくんと学ぶITパスポート or ChallengeAddition&Subtraction?

パブロフくんと学ぶITパスポート ships an update every 18 months, and ChallengeAddition&Subtraction fortnightly. Most recently, パブロフくんと学ぶITパスポート was updated on August 27, 2026 and ChallengeAddition&Subtraction on September 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*