CLASSUM vs 랭디
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CLASSUM
This platform fosters active communication and engagement between students and instructors, creating a dynamic learning environment. It offers AI-powered tools for educators and students, alongside flexible features for global collaboration and system integration.
- SNS-style communication
- Anonymous questions
- AI tutor for students and instructors
- Multi-language support
- Flexible curriculum design
- Team activity collaboration
- Interactive challenges
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Communication-Centered LMS Where Students Stay and Grow with Professors, CLASSUM CLASSUM is not just a repository for course materials, but creates a vibrant learning environment where students and instructors actively communicate. It's a next-generation learning management platform that motivates students through natural participation and helps them stay engaged throughout their learning journey. [Service Introduction] 1. A Learning Environment Where Students Stay Longer Engagement Through Active Communication: With familiar SNS-style UI and anonymous questions lowering communication barriers, we build a solid foundation for improving student retention rates. Value of Participation Data: Monitor student participation and response rates in real-time to quickly identify students who need more personalized learning support. 2. AI Tutor That Enhances Educational Quality Smart Assistant for Instructors: AI-powered quiz generation and grading criteria suggestions based on course materials reduce repetitive tasks and help focus on the essence of education. 24/7 Partner for Students: The AI tutor provides immediate answers to student questions, supporting self-directed learning without waiting for professors. 3. Flexible Scalability Without Boundaries Global and Industry-Academia Support: Multi-language support helps international students adapt, while guest login features enable seamless integration of industry-academia collaboration projects and extracurricular programs. Seamless System Integration: Synchronize with existing academic systems as well as frequently used tools like Zoom and CMS. [Key Features] Thoughtful Notifications & Messages: Never miss learning deadlines with timely notifications, plus support smooth communication with instructors through 1:1 messages. - Flexible Curriculum for Higher Engagement: Combine various content types including live video lectures, VOD, interactive quizzes, and assignments to design customized educational programs for students. - Collaborative Team Activities: Conduct team activities conveniently with team-specific boards and file sharing. Instructors can monitor team progress in real-time and provide timely support. - Fun Community Communication: Enjoy easy SNS-style communication and share opinions lightly and enjoyably using various emoticons. - Motivating Challenges: Keep students motivated with game-like activities including video submissions, quizzes, and interactive tasks that help them reach their learning goals.
랭디
This app offers interactive language learning through native speaker-led lessons and one-on-one conversation practice. It focuses on practical, real-world expressions and provides structured learning paths with AI-powered feedback and content from popular media.
- 1:1 real-time conversation practice
- Native speaker-led courses
- AI-powered learning and feedback
- Real-world expression mastery
- Structured learning system (prep, class, practice, review)
- Content from dramas and variety shows
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■ 랭디 - 네이티브 강의부터 1:1 실전 회화까지! • 네이티브 회화 강의 랭디 런 + 찐친 선생님과 1:1 전화 수업 랭디 톡 [랭디 톡] • 실전에서는 사람과 소통하니까 나와 딱 맞는 선생님과 1:1 대화 - 현지에서 쓰는 유행어부터 고급 비즈니스 표현까지! 완벽 마스터 - 끊이지 않는 대화 즐기다 보면 어느새 오늘 배울 진도 완료! • 실용성 100%! 실제 표현 1:1 학습 및 실시간 피드백 - 예습 > 1:1 수업> 작문&첨삭 > 평가&복습을 통해 체계적으로 학습 - 생동감 UP! 랭디만의 자체 제작 콘텐츠로 네이티브 표현 학습 가능 - 현지에서 실제로 사용하는 표현을 예능, 드라마릍 통해 재미있게 학습 • 믿고 보는 회화 전문가 - 전원 ESL, TOPIK 자격증 보유, 대한민국 TOP10 석•학사급 선생님 라인업 - 4단계 엄격한 기준을 통해 전문 선생님 선발 및 300시간의 교육 및 평가 진행 [랭디 런] • 네이티브 원어민 선생님의 회화 강의 - 한국어 학습 경험 총 65년 원어민의 회화 학습법 전수 - 외국어 학습 경험을 바탕으로 한국인 학습자의 페인 포인트 공략 • 회화 마스터를 위한 3-STEP 학습 시스템 - 패턴 훈련을 통해 네이티브처럼 말할 수 있도록 언어 소리 규칙 학습 - 생생한 이미지를 반복해서 확장하며 회화 표현을 머리에 확실하게 각인 - AI 학습 기능을 통해 배운 표현을 응용하며 부담 없는 실전 대화 연습 • 말도 나오고 이해까지 되는 체계적인 커리큘럼 - 발음 > 메인 > 문법 강좌를 통해 기초부터 자격증 스펙까지 완성 - 매월 신규 업데이트되는 모든 강의 무제한 수강 가능 우리 이것만 기억해요. 회화는 공부가 아니라 사람과의 대화라는 것 :D 지루한 외국어는 없다, 랭디 이용약관: https://langdy.net/terms 개인정보처리방침: https://langdy.net/terms/privacy
Screenshots
Verdict
The clearest difference is rating: 랭디 at 5.0 against CLASSUM's 3.8. 랭디 also leads on review sentiment (97% vs 63%) and update cadence (weekly vs fortnightly). CLASSUM's advantage is in-app purchases (none vs 9) and ratings volume (20 vs 2). On price, ads, monetization model and device support 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. 랭디 sells 9 in-app purchases, starting at $6.99 per month. CLASSUM asks for nothing beyond the download.
랭디 holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: CLASSUM has 20 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 63% of CLASSUM's written reviews are positive against 97% of 랭디's.
CLASSUM ships an update fortnightly, 랭디 weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | CLASSUM | 랭디 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (20 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 63.0% of reviews | 97.0% of reviews — better |
| Number of ratings | 20 — better | 2 |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 85 MB | 135 MB |
| Age rating | 4+ | 4+ |
| Developer | CLASSUM Co., Ltd. | Langdy |
Customer experience
CLASSUM
랭디
In-app purchases
CLASSUM
No in-app purchases
랭디
- Basic(영어)7 Days trial$6.991 Month
- Standard(영어)7 Days trial$8.991 Month
- 런 랭디패스 Basic 월정기 (일본어)7 Days trial$8.991 Month
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- Basic(중국어)7 Days trial$8.991 Month
- Standard(중국어)7 Days trial$9.991 Month
- Standard(일본어)7 Days trial$9.991 Month
- 런 랭디패스 Plus 월정기 (영어)1 Month trial$11.991 Month
- 런 랭디패스 Plus 월정기 (일본어)1 Month trial$12.991 Month
- 런 랭디패스 Plus 월정기 (중국어)1 Month trial$12.991 Month









