# PlanetSpark vs Cosmo (formerly ClassUp)

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.

Both are free to download. Cosmo (formerly ClassUp) sells 3 one-off in-app purchases. PlanetSpark asks for nothing beyond the download.

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.

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.

## The numbers

| Metric | PlanetSpark | Cosmo (formerly ClassUp) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/planetspark/id1610160403/reviews)** | [4.5 (879 ratings)](https://appshunter.io/ios/app/cosmo-formerly-classup/id1624007748/reviews) |
| Number of ratings | 1 | **879** |
| Positive reviews | 53.8% of reviews | **79.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 62 MB | 408 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kunal Malik](https://appshunter.io/developer/1610156743) | [Algorithm of Learning Inc.](https://appshunter.io/developer/1787524245) |

## What reviewers say

### PlanetSpark

[App page](https://appshunter.io/ios/app/planetspark/id1610160403)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Cosmo (formerly ClassUp)

[App page](https://appshunter.io/ios/app/cosmo-formerly-classup/id1624007748)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| First Class | $0.99 | one-time |
| Test 20 lessons package | $0.99 | one-time |
| 3 one-on-one classes | $74.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*