Comparison

FluentJoy vs Cosmo (formerly ClassUp)

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

Head to head
About

FluentJoy

Improve your English skills with interactive video lessons, AI-powered conversation practice, and pronunciation feedback. Tailored learning paths adapt to your goals, making it effective and fun for various proficiency levels.

Highlights
  • Video-based English lessons
  • AI-powered conversation practice
  • Instant pronunciation feedback
  • Interactive quizzes
  • Personalized learning paths
  • Email and business English tips
Features
Read full description

FluentJoy: Learn English with Real-Life Practice FluentJoy helps you improve your English through video-based lessons, conversation practice, and pronunciation training. Whether you're preparing for IELTS or TOEFL, working in an English-speaking environment, or simply want to feel more confident in conversations, FluentJoy makes learning effective and fun. Key Features: - Video Lessons: Learn grammar, vocabulary, and useful phrases through short, engaging videos. - AI-Powered Conversations: Chat with a smart virtual assistant tailored to your level. - Pronunciation Practice: Get instant feedback to improve your accent. - Quizzes: Test your listening and grammar with interactive quizzes. - Personalized Learning: Your learning path adapts to your goals and progress. - Email & Business English Tips: Communicate clearly and professionally. - Mobile-Friendly: Learn anywhere, anytime. FluentJoy is for students, professionals, travelers, and anyone who wants to speak English confidently. Join a global community and take your English to the next level. ------------------- Terms of Service: https://www.fluentjoy.com/terms-of-use Privacy Policy: https://www.fluentjoy.com/privacy-policy

About

Cosmo (formerly ClassUp)

This app offers a future-ready education system combining AI and real teachers for personalized learning. It provides live 1-on-1 classes, flexible scheduling, AI-powered study assistance, and progress tracking to foster confident, motivated learners.

Highlights
  • Live 1-on-1 classes with AI and human teachers
  • AI-powered personalized learning plans
  • Instant homework help and chat support
  • AI writing assistant for assignments
  • Unlimited math and ELA practice
  • Progress tracking dashboard
  • Flexible 24/7 scheduling
Read full description

Becoming a confident thinker. A curious problem-solver. A joyful, motivated learner who’s ready for whatever the future holds. We’re a future-ready education system—powered by AI, guided by real teachers, and built for how children actually grow. 1. Live 1-on-1 Classes: Human Teachers + Smart AI In every session, real teachers and AI collaborate to create dynamic lessons that drive progress. Our virtual classrooms include interactive tools (whiteboards, quizzes!) to boost engagement. 2. Pick Your Favorite Teacher (or Let Us Choose!) Our experts match students with teachers based on learning style and goals—or you can directly select your preferred instructor from our verified educators. 3. Flex Scheduling: Learn Anytime, Anywhere Book classes 24/7 from your couch, library, or even soccer practice. Reschedule freely with xx-hour notice. 4. Cosmo: The AI Study Buddy Who Gets It 4.1 AI-Powered Personalized Learning Plans Customized weekly roadmaps adapting to your child’s pace and progress. 4.2 Instant Homework Help & Chat "Hey Cosmo, explain algebra!" Get step-by-step solutions, class bookings, or a pep talk with meme reactions. 4.3 AI Writing Tool Snap a photo of writing assignments for: Grammar fixes, Style suggestions, "Aha!" revision tips 4.4 Unlimited Practice for Math & ELA Enjoy endless questions and instant feedback—perfect for all skill levels. Learn anytime, anywhere! 4.5 Progress Tracking Dashboard Track mastered skills and growth areas with color-coded reports updated monthly.

Screenshots

FluentJoy4 screens
Cosmo (formerly ClassUp)4 screens

Verdict

The call

The clearest difference is rating: FluentJoy at 4.8 against Cosmo (formerly ClassUp)'s 4.5. FluentJoy also leads on ratings volume (6.5K vs 914). Cosmo (formerly ClassUp)'s advantage is review sentiment (80% vs 69%) and iOS requirement (15.0 vs 17.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FluentJoy sells 21 in-app purchases, starting at $9.99 per month and Cosmo (formerly ClassUp) sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

FluentJoy holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: FluentJoy has 6.5K ratings behind it against 914, so its average is the more settled of the two. Written reviews complicate that: 69% of FluentJoy's written reviews are positive against 80% of Cosmo (formerly ClassUp)'s, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

FluentJoy ships an update weekly, Cosmo (formerly ClassUp) every 9 days. Both last shipped on October 30, 2026.

Scorecard4 real differences · 6 level
FluentJoy versus Cosmo (formerly ClassUp): the parameters behind the verdict, then further details
ParameterFluentJoyCosmo (formerly ClassUp)
PriceFreeFree
Rating4.8 (6.5K ratings) — better4.5 (914 ratings)
Positive reviews68.9% of reviews80.1% of reviews — better
Number of ratings6.5K — better914
Update frequencyWeekly — betterEvery 9 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size499 MB408 MB
Age rating4+4+
DeveloperFluentjoy, IncAlgorithm of Learning Inc.

Customer experience

FluentJoy

All ratings6,487 ratings
Positive94.1%
Neutral3.4%
Negative2.5%
Written reviews61 reviews
Positive68.9%
Neutral8.2%
Negative23.0%

Cosmo (formerly ClassUp)

All ratings914 ratings
Positive85.9%
Neutral2.0%
Negative12.1%
Written reviews171 reviews
Positive80.1%
Neutral2.9%
Negative17.0%

User reviews

FluentJoy

From 6.5K App Store ratings

What we love

  • 💪 Excellent for learning English
  • 🎓 Effective learning method
  • 🤩 Exciting and enjoyable app

Room to improve

  • 🔒 No way to cancel subscription
  • 💰 Expensive subscription
  • 🐛 Issues with subscription and features

Cosmo (formerly ClassUp)

From 914 App Store ratings

What we love

  • 👍 Awesome teachers
  • 🚀 Personalized learning
  • 💡 Engaging and fun lessons
  • 🚀 Flexible scheduling
  • 👍 Knowledgeable and professional tutors

Room to improve

  • 🐛 Scheduling issues and class cancellations
  • 💰 Expensive pricing
  • 🤯 Poor customer service and communication
  • 🐛 Technical issues with app and connectivity

Bugs and requests

FluentJoy

Reported bugs

3 issues
  • Subscription issues
  • Slow video loading
  • Compatibility problems

Requested features

3 requests
  • Free trial or free plan
  • Improved subscription management
  • More content and examples

Cosmo (formerly ClassUp)

Reported bugs

3 issues
  • Frequent class cancellations
  • Billing and refund issues
  • Unreliable internet connectivity during classes

Requested features

4 requests
  • More affordable pricing options
  • Improved scheduling and class management
  • Better communication with parents
  • Enhanced technical stability and reliability

In-app purchases

21 purchases

FluentJoy

Subscriptions20
  • 1 month subscription7 Days trial$9.991 Month
  • Fluentjoy 1 month1 Month trial2 variants$14.991 Month
  • Fluentjoy 1 Month$14.991 Month
Show 17 more
  • 1 month 80% OFF 1st month1 Month trial$14.991 Month
  • Fluentjoy 1 Month7 Days trial$14.991 Month
  • Fluentjoy 1 Month7 Days trial2 variants$19.991 Month
  • Fluentjoy 3 months7 Days trial$29.993 Months
  • Fluentjoy 3 months 40% OFF$29.993 Months
  • Fluentjoy 3 months Promo 66%3 Months trial$29.993 Months
  • Fluentjoy 1 Year$39.991 Year
  • Fluentjoy 1 Year 50% OFF$44.991 Year
  • Fluentjoy 1 year7 Days trial$59.991 Year
  • Fluentjoy 1 Year$59.991 Year
  • Fluentjoy 1 Year promo 33%1 Year trial$59.991 Year
  • Fluentjoy 1 Year promo 50%1 Year trial$59.991 Year
  • Fluentjoy 1 Year7 Days trial2 variants$89.991 Year
  • Fluentjoy 1 year7 Days trial$89.991 Year
  • 1 Year / 1 Month FREE Trial1 Month trial$89.991 Year
  • Fluentjoy 1 Year 50% promo1 Year trial$119.991 Year
  • 1 week trial with yearly plan7 Days trial$119.991 Year
One-time1
  • Fluentjoy Lifetime Product$99.99
2 purchases

Cosmo (formerly ClassUp)

One-time2
  • First Class$0.99
  • Test 20 lessons package$0.99

Questions

Is FluentJoy free?
FluentJoy is free to download, with in-app purchases available.
Is Cosmo (formerly ClassUp) free?
Cosmo (formerly ClassUp) is free to download, with in-app purchases available.
Which has better reviews, FluentJoy or Cosmo (formerly ClassUp)?
FluentJoy is rated higher. FluentJoy averages 4.8 out of 5 from 6.5K ratings, while Cosmo (formerly ClassUp) averages 4.5 from 914 ratings.
Do FluentJoy or Cosmo (formerly ClassUp) have ads?
Neither FluentJoy nor Cosmo (formerly ClassUp) shows ads.
Which is updated more often, FluentJoy or Cosmo (formerly ClassUp)?
FluentJoy ships an update weekly, and Cosmo (formerly ClassUp) every 9 days. Most recently, FluentJoy was updated on October 30, 2026 and Cosmo (formerly ClassUp) on October 30, 2026.

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