# Challenge English vs KOOV®

The clearest difference is rating: KOOV® at 4.8 against Challenge English's 1.0. KOOV® also leads on ratings volume (6 vs 1). Challenge English's advantage is device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KOOV® holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: KOOV® has 6 ratings behind it against 1, so its average is the more settled of the two.

Challenge English ships an update every 4 months, KOOV® every 2 months. The most recent releases landed on August 28, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Challenge English | KOOV® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/challenge-english/id960558908/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/koov/id1188974713/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | 39.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 39 MB | 272 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 9+ | 4+ |
| Developer | [Benesse Corporation](https://appshunter.io/developer/381219440) | [SONY GLOBAL EDUCATION, INC.](https://appshunter.io/developer/994421997) |

## What reviewers say

### Challenge English

[App page](https://appshunter.io/ios/app/challenge-english/id960558908)

This app helps elementary school students develop balanced English skills in reading, writing, speaking, and listening. It offers personalized learning levels and can help users achieve English proficiency up to the junior high school third-year level. A free trial is available without login.

**Highlights:** Personalized learning levels, Develop reading, writing, speaking, listening, Achieve junior high 3rd-year English proficiency, Free trial available, Requires Benesse service contract

**In-app purchases:** none


### KOOV®

[App page](https://appshunter.io/ios/app/koov/id1188974713)

This educational app teaches coding and robotics through interactive lessons and hands-on robot building. Users can follow pre-written code, earn badges for completing courses, and create their own unique robot designs.

**Highlights:** 3D building guide, Visual programming with coding blocks, Robot Recipes with pre-written code, Learning Course with badges, Free Production for custom robots, Collection of activities and creations

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Challenge English free?

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

### Is KOOV® free?

KOOV® is free to download, with no in-app purchases.

### Which has better reviews, Challenge English or KOOV®?

KOOV® is rated higher. Challenge English averages 1.0 out of 5 from 1 ratings, while KOOV® averages 4.8 from 6 ratings.

### Do Challenge English or KOOV® have ads?

Neither Challenge English nor KOOV® shows ads.

### Which is updated more often, Challenge English or KOOV®?

Challenge English ships an update every 4 months, and KOOV® every 2 months. Most recently, Challenge English was updated on August 28, 2026 and KOOV® 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.*