Comparison

CLASSUM vs 랭디

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • SNS-style communication
  • Anonymous questions
  • AI tutor for students and instructors
  • Multi-language support
  • Flexible curriculum design
  • Team activity collaboration
  • Interactive challenges
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

■ 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

CLASSUM4 screens
랭디4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 랭디 sells 9 in-app purchases, starting at $6.99 per month. CLASSUM asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

CLASSUM ships an update fortnightly, 랭디 weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 5 level
CLASSUM versus 랭디: the parameters behind the verdict, then further details
ParameterCLASSUM랭디
PriceFreeFree
Rating3.8 (20 ratings)5.0 (2 ratings) — better
Positive reviews63.0% of reviews97.0% of reviews — better
Number of ratings20 — better2
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size85 MB135 MB
Age rating4+4+
DeveloperCLASSUM Co., Ltd.Langdy

Customer experience

CLASSUM

All ratings20 ratings
Positive70.0%
Neutral5.0%
Negative25.0%
Written reviews54 reviews
Positive63.0%
Neutral9.3%
Negative27.8%

랭디

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews33 reviews
Positive97.0%
Neutral0.0%
Negative3.0%

In-app purchases

None

CLASSUM

No in-app purchases

9 purchases

랭디

Subscriptions9
  • 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
Show 6 more
  • 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

Questions

Is CLASSUM free?
CLASSUM is free to download, with no in-app purchases.
Is 랭디 free?
랭디 is free to download, with in-app purchases available.
Which has better reviews, CLASSUM or 랭디?
랭디 is rated higher. CLASSUM averages 3.8 out of 5 from 20 ratings, while 랭디 averages 5.0 from 2 ratings.
Do CLASSUM or 랭디 have ads?
Neither CLASSUM nor 랭디 shows ads.
Which is updated more often, CLASSUM or 랭디?
CLASSUM ships an update fortnightly, and 랭디 weekly. Most recently, CLASSUM was updated on October 24, 2026 and 랭디 on October 25, 2026.

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