# Critical Thinking Concepts vs Oscelyra

The clearest difference is update cadence: Oscelyra at every 5 days against Critical Thinking Concepts's every 2 months. Oscelyra also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Critical Thinking Concepts ships an update every 2 months, Oscelyra every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Critical Thinking Concepts | Oscelyra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (38 ratings)](https://appshunter.io/ios/app/critical-thinking-concepts/id6446604872/reviews)** | — |
| Number of ratings | **38** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 15 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Anthony Harvey](https://appshunter.io/developer/1478197285) | [Yousef Abutaleb](https://appshunter.io/developer/6800436156) |

## What reviewers say

### Critical Thinking Concepts

[App page](https://appshunter.io/ios/app/critical-thinking-concepts/id6446604872)

This app is an interactive study companion that teaches core concepts, methods, and terminology of critical thinking. It helps users develop analytical and reasoning skills for navigating complex issues effectively. Features include Q&A, swipe cards, a visual feed, audio playback, and study statistics.

**Highlights:** Question & Answer format, Swipe card learning, Visual learning feed, Audio player for lessons, Study statistics tracking, Offline usability

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access Monthly | $3.99 | per month |
| All Access Annual | $7.99 | per year |


### Oscelyra

[App page](https://appshunter.io/ios/app/oscelyra/id6800436154)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $12.99 | per month |
| Exam Season (3 months) | $29.99 | per 3 months |


## Frequently asked questions

### Is Critical Thinking Concepts free?

Critical Thinking Concepts is free to download, with in-app purchases available.

### Is Oscelyra free?

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

### Do Critical Thinking Concepts or Oscelyra have ads?

Neither Critical Thinking Concepts nor Oscelyra shows ads.

### Which is updated more often, Critical Thinking Concepts or Oscelyra?

Critical Thinking Concepts ships an update every 2 months, and Oscelyra every 5 days. Most recently, Critical Thinking Concepts was updated on October 24, 2026 and Oscelyra on October 24, 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.*