# LeetCard vs Cosmo

The clearest difference is ads: Cosmo at none against LeetCard's shown. Cosmo also leads on review sentiment (84% vs 50%) and rating (4.8 vs 4.4). LeetCard's advantage is update cadence (every 2 days vs fortnightly). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. LeetCard sells 2 in-app purchases, starting at $3.99 per month and Cosmo sells 4 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Cosmo holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Cosmo has 860 ratings behind it against 83, so its average is the more settled of the two. Written reviews point the same way: 50% of LeetCard's written reviews are positive against 84% of Cosmo's.

LeetCard ships an update every 2 days, Cosmo fortnightly. Both last shipped on November 8, 2026.

## The numbers

| Metric | LeetCard | Cosmo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (83 ratings)](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443/reviews) | **[4.8 (860 ratings)](https://appshunter.io/ios/app/cosmo-learn-genai-and-more/id6744418707/reviews)** |
| Number of ratings | 83 | **860** |
| Positive reviews | 50.0% of reviews | **84.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 124 MB | 95 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kubicle LLC](https://appshunter.io/developer/1679797468) | [CodeSignal](https://appshunter.io/developer/1807636459) |

## What reviewers say

### LeetCard

[App page](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443)

Prepare for coding interviews with AI-powered flashcards and adaptive learning. Master data structures, algorithms, and coding patterns with personalized plans and intelligent hints. Track your progress with detailed analytics to identify weak areas and stay motivated.

**Highlights:** AI-powered hints, Personalized study plans, Smart flashcards, Clean organization, Personalized dashboard, Detailed analytics

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LeetCard Pro | $3.99 | per month |
| LeetCard Pro | $24.99 | per year |


### Cosmo

[App page](https://appshunter.io/ios/app/cosmo-learn-genai-and-more/id6744418707)

This app offers hands-on, practice-based lessons to build in-demand skills in areas like GenAI, business, and tech. It acts as a personal AI tutor, adapting to your learning pace and providing instant help on any topic. Earn shareable certificates and skill badges to advance your career.

**Highlights:** Personalized AI tutor, Hands-on, practice-based lessons, Learn GenAI, business, tech, and more, Earn skill badges and certificates, Instant help on any topic, 200+ career-building skills

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $12.99 | per month |
| Unlimited Access | $24.99 | per month |
| Unlimited Access | $78.00 | per year |
| Unlimited Access | $149.99 | per year |

**What reviewers like**

- 🌟 Amazing app
- 🎮 Gamification that feels productive
- 🚀 Learning made easy - on the go!
- 😊 Cutest teacher award goes to Cosmo!!!
- 👍 So much better than doom scrolling!

**Requested features**

- Ability to upgrade/customize Cosmo's outfit and spaceship


## Frequently asked questions

### Is LeetCard free?

LeetCard is free to download, with in-app purchases available.

### Is Cosmo free?

Cosmo is free to download, with in-app purchases available.

### Which has better reviews, LeetCard or Cosmo?

Cosmo is rated higher. LeetCard averages 4.4 out of 5 from 83 ratings, while Cosmo averages 4.8 from 860 ratings.

### Do LeetCard or Cosmo have ads?

LeetCard shows ads; Cosmo does not.

### Which is updated more often, LeetCard or Cosmo?

LeetCard ships an update every 2 days, and Cosmo fortnightly. Most recently, LeetCard was updated on November 8, 2026 and Cosmo on November 8, 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.*