# JClass vs Challenge with Erin

The clearest difference is price: Challenge with Erin at Free against JClass's $4.99. Challenge with Erin also leads on in-app purchases (none vs 6) and iOS requirement (12.0 vs 15.0). JClass's advantage is ratings volume (376 vs 16) and review sentiment (75% vs 63%). On rating, ads and device support there is nothing between them.

Challenge with Erin is free to download; JClass costs $4.99 up front. JClass sells 6 one-off in-app purchases. Challenge with Erin asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for JClass against 4.7 for Challenge with Erin. That said, the two scores are not equally well evidenced: JClass has 376 ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 75% of JClass's written reviews are positive against 63% of Challenge with Erin's.

JClass ships an update every 2 months, Challenge with Erin every 5 months. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | JClass | Challenge with Erin |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.7 (376 ratings)](https://appshunter.io/ios/app/jclass-study-kanji/id1226096296/reviews) | [4.7 (16 ratings)](https://appshunter.io/ios/app/challenge-with-erin/id1290748939/reviews) |
| Number of ratings | **376** | 16 |
| Positive reviews | **75.5% of reviews** | 62.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 53 MB | 290 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Cozain](https://appshunter.io/developer/576265620) | [The Japan Foundation Japanese-Language Institute, Kansai](https://appshunter.io/developer/1023654861) |

## What reviewers say

### JClass

[App page](https://appshunter.io/ios/app/jclass-study-kanji/id1226096296)

Master Japanese easily with a virtual tutor. Progress through hiragana, katakana, kanji, and vocabulary with interactive quizzes and progress tracking. Earn achievements and compete on leaderboards.

**Highlights:** Learn hiragana, katakana, and kanji, Vocabulary building, Interactive quiz mode, Progress tracking, Achievements and leaderboards, Content review by level

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JLPT N5 | Free | one-time |
| JLPT N4 | Free | one-time |
| JLPT N2 | Free | one-time |
| JLPT N3 | Free | one-time |
| JLPT N1 | Free | one-time |
| Full JLPT Access | Free | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Effective for learning
- 💡 Good for building memory
- 💰 Great value for money
- 📚 Teaches words with kana/kanji

**What reviewers complain about**

- 🐛 Crashing issues
- ❌ No Russian language support
- ❌ Limited language options
- 🐛 App hangs/freezes
- ❌ Payment issues

**Reported bugs**

- Crashing on iPhone
- App crashes with iOS 13.4
- App crashes every time
- App don't working on iPhone 5C
- Purchased but it didn’t work

**Requested features**

- Add Russian language
- Add more language options
- Ability to reset progress
- Landscape mode for iPad
- Transfer progress to other devices


### Challenge with Erin

[App page](https://appshunter.io/ios/app/challenge-with-erin/id1290748939)

This app offers interactive lessons and quizzes to help users learn Japanese vocabulary, grammar, and culture. It features engaging games, manga-based dialogues, and cultural trivia to make studying enjoyable and effective. Track your progress, earn certificates, and compete with others on leaderboards.

**Highlights:** Interactive vocabulary games, Manga-based dialogue practice, Japanese culture quizzes, Progress tracking and points system, Weekly tests with certificates, Mini dictionary with Romanization

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JClass free?

JClass costs $4.99, and also offers in-app purchases.

### Is Challenge with Erin free?

Challenge with Erin is free to download, with no in-app purchases.

### Which has better reviews, JClass or Challenge with Erin?

JClass and Challenge with Erin are both rated 4.7 out of 5 on the App Store, from 376 and 16 ratings respectively.

### Do JClass or Challenge with Erin have ads?

Neither JClass nor Challenge with Erin shows ads.

### Which is updated more often, JClass or Challenge with Erin?

JClass ships an update every 2 months, and Challenge with Erin every 5 months. Most recently, JClass was updated on October 11, 2026 and Challenge with Erin on October 15, 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.*