Comparison

PlanetSpark 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

PlanetSpark

This app offers live 1:1 online classes for public speaking and creative writing, designed to boost children's fluency, confidence, and overall personality. It provides a comprehensive curriculum taught by top educators, with personalized learning journeys and practice sessions to foster strong communication skills.

Highlights
  • 1:1 Live classes with top teachers
  • Personalized learning journeys
  • Free 1:1 learning session booking
  • Live practice sessions
  • Creative writing workshops
  • Public speaking curriculum
  • Progress reports
Features
Read full description

Welcome to PlanetSpark - Live 1:1 Online Classes for Public Speaking and Creative Writing to improve fluency, and confidence and transform your child's overall personality. We offer the world's most extensive and complete program for Public Speaking and Creative Writing for kids. PlanetSpark's app is designed and conceptualized to help kids practice, learn and understand the concepts of personality development and to boost their confidence. The communication concepts and lessons are taught in an in-depth and easy-to-grasp manner. The app is designed to offer a complete learning experience to kids via PlanetSpark's cutting-edge curriculum taught by top educators. PlanetSpark is one of the world's most loved and fastest-growing EdTech platforms. The App covers Public Speaking and Creative Writing for classes K-10 learners. But that's not all - through the App, kids can learn and choose to join the live sessions on various different topics. Through the App, kids can also register, participate and learn from our best-in-class practice sessions clubbed with live events and exclusive workshops. PlanetSpark has a global community of students spanning 13+ countries with over 1 Million live one-to-one classes enrolled which helps the students to bond together and brings in a lot of diversity through our thoroughly designed app. The App also offers numerous communities like Debate Society, Poetry Academy, Podcasting Studio, Writers Guild, Comedy Club, Theatre Troupe, and a lot more. The classes are taught by some of India's top 1% of educators. The program offers the most cutting-edge curriculum taught by highly experienced public speaking experts. Every lesson is designed for the students to create the maximum impact. The lessons are personally customized according to the needs and skills of the child and by the end of the course, the App takes the student on a personalized learning journey, based on their unique learning style so that the kid can learn in their own comfort and pace. It also offers adaptive practice sessions, home assignments by the teachers and interactive 1:1 PTM (Parent's Teacher Meetings) along with the progress report of the kid, which helps the parents to keep a track of their kids' growth and performance throughout the course. Team PlanetSpark is on a mission to transform the kids into confident and fearless communicators and speakers regardless of their choice of profession in the future. Our in-house Academic and curriculum team of highly skilled educators have designed state-of-the-art and seamless content for the students to make sure that every student at PlanetSpark not only learns and grows from the sessions but also enjoys the process of learning. Features: - Learn 1:1 Live classes by India's top teachers and personalized learning journeys. - Instantly book free 1:1 learning sessions, with one click on the app. - You can try our live practice sessions program, and learn to perfection with intuitive lessons and exercises that ensure a detailed understanding of concepts. - Take daily challenges. The app comes with a daily challenge/task submission with rewards to make learning more fun. - Analyze and track your progress, strengths, and areas of improvement through our detailed progress reports. - Know your teacher. Visit the teacher's profile for more information and transparency. - Track your payment and monitor your attendance so that you never miss out on any class.

About

Cosmo (formerly ClassUp)

This app offers AI-powered, personalized learning experiences guided by real teachers. It provides live 1-on-1 classes, instant homework help, and adaptive learning plans to foster confident and 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 tool for assignments
  • Unlimited practice for Math & ELA
  • Progress tracking dashboard
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

PlanetSpark4 screens
Cosmo (formerly ClassUp)4 screens

Verdict

The call

The clearest difference is rating: PlanetSpark at 5.0 against Cosmo (formerly ClassUp)'s 4.5. PlanetSpark also leads on in-app purchases (none vs 3) and iOS requirement (13.4 vs 15.0). Cosmo (formerly ClassUp)'s advantage is review sentiment (80% vs 54%) and ratings volume (879 vs 1). On price, ads 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. Cosmo (formerly ClassUp) sells 3 one-off in-app purchases. PlanetSpark asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PlanetSpark holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Cosmo (formerly ClassUp) has 879 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 54% of PlanetSpark'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

PlanetSpark ships an update every 5 weeks, Cosmo (formerly ClassUp) every 9 days. The most recent releases landed on October 3, 2026 and October 15, 2026 respectively.

Scorecard7 real differences · 3 level
PlanetSpark versus Cosmo (formerly ClassUp): the parameters behind the verdict, then further details
ParameterPlanetSparkCosmo (formerly ClassUp)
PriceFreeFree
Rating5.0 (1 ratings) — better4.5 (879 ratings)
Positive reviews53.8% of reviews79.8% of reviews — better
Number of ratings1879 — better
Update frequencyEvery 5 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.4 — better15.0
Further details — not scored
Size62 MB408 MB
Age rating4+4+
DeveloperKunal MalikAlgorithm of Learning Inc.

Customer experience

PlanetSpark

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive53.8%
Neutral0.0%
Negative46.2%

Cosmo (formerly ClassUp)

All ratings879 ratings
Positive86.1%
Neutral1.8%
Negative12.1%
Written reviews168 reviews
Positive79.8%
Neutral3.0%
Negative17.3%

Bugs and requests

PlanetSpark

Not enough reviews yet to summarise bugs or requests.

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

None

PlanetSpark

No in-app purchases

3 purchases

Cosmo (formerly ClassUp)

One-time3
  • First Class$0.99
  • Test 20 lessons package$0.99
  • 3 one-on-one classes$74.99

Questions

Is PlanetSpark free?
PlanetSpark is free to download, with no in-app purchases.
Is Cosmo (formerly ClassUp) free?
Cosmo (formerly ClassUp) is free to download, with in-app purchases available.
Which has better reviews, PlanetSpark or Cosmo (formerly ClassUp)?
PlanetSpark is rated higher. PlanetSpark averages 5.0 out of 5 from 1 ratings, while Cosmo (formerly ClassUp) averages 4.5 from 879 ratings.
Do PlanetSpark or Cosmo (formerly ClassUp) have ads?
Neither PlanetSpark nor Cosmo (formerly ClassUp) shows ads.
Which is updated more often, PlanetSpark or Cosmo (formerly ClassUp)?
PlanetSpark ships an update every 5 weeks, and Cosmo (formerly ClassUp) every 9 days. Most recently, PlanetSpark was updated on October 3, 2026 and Cosmo (formerly ClassUp) on October 15, 2026.

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