랭콘아일랜드 4.0 vs April Buff
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
랭콘아일랜드 4.0
This mobile program is designed for students to naturally learn and reinforce language acquisition through homework, review, and preview exercises linked to academy classes. It offers four difficulty levels for practice, accessible even to non-students.
- Mobile homework assignments
- Integrated with academy classes
- Language acquisition reinforcement
- Homework, preview, and review exercises
- Four difficulty levels of practice
Read full descriptionHide full description
랭콘 재원생을 위한 모바일 숙제장 - 랭콘아일랜드 4.0 학원수업과 연계되어 숙제, 예/복습을 통해 언어습득에 필요한 6가지 요소를 자연스럽게 익히고 강화시키는 온라인 프로그램입니다. 네 개 난이도의 체험하기가 제공됩니다. 랭콘 재원생이 아니어도 체험할 수 있습니다. 최소사양 - iOS 10.0 이상 - iPhone 6 또는 iPad Air 이후 출시 기기
April Buff
This app uses augmented reality to make learning English vocabulary fun for elementary students. It offers interactive games, quizzes, and progress tracking linked to a specific curriculum. Users can collect word cards and compete nationally.
- AR-based vocabulary study
- Interactive games and quizzes
- Collect word and chunk cards
- National ranking system
- Scan textbook to start games
- Linked to Learning Portal
Read full descriptionHide full description
※ April Buff is an AR-based vocabulary study and quiz APP for elementary school students using April English curriculum. - Use augmented reality(AR) technology to study vocabulary and take quizzes through fun games - Prepare for April English weekly and monthly tests by solving questions and studying key words again - Collect words and chunks cards from playing games and study them again from the Card Box - Check your national ranking after completing each game - You must have April Gallery Book to use the April Buff app. ※ Game Variation by Level 1. Slime Time (Rookie/Seedbed/Seed) : Make your own slime by mixing the ingredients! 2. Dungeon Escape (Sprout) : Complete the mission and escape the underground dungeon! 3. Drone High (Sapling/Junior Master) : Charge the drone and fly it high up! ※ Main features of April Buff - Start the game by scanning the textbook. - Play vocab word games using the AR camera. - Collect words and chunks from playing the games. - Check your national ranking for each level - Linked to the Learning Portal - Change language setting ▶ Access Request Guide All access requests are collected for app usage. [Mandatory Access Request] -Device and App History: Access for App version check -Storage: File and media -Camera: Access for augmented reality effects
Screenshots
Verdict
The clearest difference is rating: April Buff at 4.6 against 랭콘아일랜드 4.0's 1.0. April Buff also leads on review sentiment (72% vs 35%) and ratings volume (7 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.
April Buff holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: April Buff has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 35% of 랭콘아일랜드 4.0's written reviews are positive against 72% of April Buff's.
랭콘아일랜드 4.0 ships an update monthly, April Buff every 5 weeks. The most recent releases landed on June 24, 2026 and August 13, 2026 respectively.
| Parameter | 랭콘아일랜드 4.0 | April Buff |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 4.6 (7 ratings) — better |
| Positive reviews | 34.8% of reviews | 72.4% of reviews — better |
| Number of ratings | 1 | 7 — better |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 2.4 GB | 208 MB |
| Age rating | 4+ | 4+ |
| Developer | Avalon Education | CREVERSE, Inc. |
Customer experience
랭콘아일랜드 4.0
April Buff
In-app purchases
랭콘아일랜드 4.0
No in-app purchases
April Buff
No in-app purchases
