# KanaDrills vs Challenge with Erin

The clearest difference is rating: Challenge with Erin at 4.7 against KanaDrills's 4.0. Challenge with Erin also leads on in-app purchases (none vs 1) and update cadence (every 5 months vs every 12 months). KanaDrills's advantage is review sentiment (75% vs 63%). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. KanaDrills sells 1 one-off in-app purchase. Challenge with Erin asks for nothing beyond the download.

Challenge with Erin holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Challenge with Erin has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 75% of KanaDrills's written reviews are positive against 63% of Challenge with Erin's, so the app with the better star average is not the one people write more warmly about.

KanaDrills ships an update every 12 months, Challenge with Erin every 5 months. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | KanaDrills | Challenge with Erin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/kanadrills/id518040286/reviews) | **[4.7 (16 ratings)](https://appshunter.io/ios/app/challenge-with-erin/id1290748939/reviews)** |
| Number of ratings | 3 | **16** |
| Positive reviews | **75.0% of reviews** | 62.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 1 MB | 290 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gestell, LLC](https://appshunter.io/developer/518040669) | [The Japan Foundation Japanese-Language Institute, Kansai](https://appshunter.io/developer/1023654861) |

## What reviewers say

### KanaDrills

[App page](https://appshunter.io/ios/app/kanadrills/id518040286)

Master Japanese hiragana and katakana with this focused learning tool. It offers customizable quizzes to test your knowledge of the Japanese syllabaries, including combination characters. Track your progress and sync scores across devices.

**Highlights:** Complete hiragana and katakana syllabaries, Includes combination characters, Customizable quiz lengths (25-100 questions), Progress tracking with high scores, iCloud synchronization, Universal app for iOS devices

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extend Kana Drills | $2.99 | one-time |


### 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 KanaDrills free?

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

### Is Challenge with Erin free?

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

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

Challenge with Erin is rated higher. KanaDrills averages 4.0 out of 5 from 3 ratings, while Challenge with Erin averages 4.7 from 16 ratings.

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

Neither KanaDrills nor Challenge with Erin shows ads.

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

KanaDrills ships an update every 12 months, and Challenge with Erin every 5 months. Most recently, KanaDrills was updated on October 13, 2026 and Challenge with Erin on October 20, 2026.

---

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