Challenge English vs KOOV®
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Challenge English
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.
- Personalized learning levels
- Develop reading, writing, speaking, listening
- Achieve junior high 3rd-year English proficiency
- Free trial available
- Requires Benesse service contract
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お子さま１人１人に合ったレベルで学べる小学生向け英語学習アプリ〈Challenge English〉。 「読む・書く・話す・聞く」の力をバランスよく伸ばし、中学３年生レベルの英語力まで身につけられます。 ※無料体験版はログイン不要でご利用いただけます。 ■ご利用にあたって ・本アプリは、「進研ゼミ」や「Challenge English」または他のベネッセサービスのご契約時に発行された情報を用いてログインすることができます。 ■ご注意事項 ※ご利用には「進研ゼミ」や「Challenge English」または「対象のベネッセサービス」の契約が必要です。 ※快適なご利用の為にWiFiでのご利用をお勧め致します。 ■〈Challenge English〉でのお客様の情報の取扱いについて 「サイト・アプリ」でのお客様に関する情報の取扱い」もあわせてご確認ください。 1．GPSによる位置情報、端末固有ID等、電話帳、スマートフォンに保存している写真や動画は取得しません。 2．お客様の情報を第三者に提供・送信することはありません。 3．本アプリでのお客様の情報の取扱いについては、個人情報お問い合わせ窓口（0120-924721 通話料無料、年末年始を除く、9時〜18時）にて承ります。
KOOV®
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.
- 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
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This is an app available on iPad for using KOOV™, a coding and robotics kit provided by Sony Global Education, Inc. To use this app, please purchase a KOOV™ kit, create an account at www.koov.io, then download this app to an iPad Air / Pro / mini 4 or later versions. Learn all about coding while having fun with the KOOV™ app, and discover and enjoy the world of coding. [Steps of Learning] - Robot Recipes: Build robots and get them moving straight away using pre-written code from the KOOV team. - Learning Course: Learn about the world of coding and robotics and get "badges" to prove your coding skills. - Free Production: Create your own unique robots from scratch and share your creations with the world. - Collection: This is where you find your record of all activities, the badges you earned, and the robots that you made. [Features] - The 3D building guide: The 3D building guide helps you understand how blocks are connected and how robots are structured by looking at the instruction images from different angles, or by zooming in and out. - Visual programming: KOOV uses visual programming so that even beginners can swiftly understand how to code by snapping the "coding blocks". You can easily make your own robot move in your own way by testing the code out with a robot.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Challenge English | KOOV® |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 4.8 (6 ratings) — better |
| Positive reviews | 39.6% of reviews | — |
| Number of ratings | 1 | 6 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 39 MB | 272 MB |
| Age rating | 9+ | 4+ |
| Developer | Benesse Corporation | SONY GLOBAL EDUCATION, INC. |
Customer experience
Challenge English
KOOV®
In-app purchases
Challenge English
No in-app purchases
KOOV®
No in-app purchases
Questions
Is Challenge English free?
Is KOOV® free?
Which has better reviews, Challenge English or KOOV®?
Do Challenge English or KOOV® have ads?
Which is updated more often, Challenge English or KOOV®?
Other comparisons
