# Darwin Speaks vs Rachel Carson

The clearest difference is price: Darwin Speaks at Free against Rachel Carson's $1.99. Darwin Speaks also leads on iOS requirement (12.0 vs 15.6). Rachel Carson's advantage is update cadence (every 26 months vs every 51 months). On ads, in-app purchases and device support there is nothing between them.

Darwin Speaks is free to download; Rachel Carson costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Darwin Speaks ships an update every 51 months, Rachel Carson every 26 months. The most recent releases landed on October 24, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Darwin Speaks | Rachel Carson |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/darwin-speaks/id1020696786/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 51 months | **Every 26 months** |
| Monetization | Free | — |
| Size | 1.2 GB | 36 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPad, Mac, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Dynamoid, LLC](https://appshunter.io/developer/429123556) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Darwin Speaks

[App page](https://appshunter.io/ios/app/darwin-speaks/id1020696786)

Engage in an interactive interview with a virtual Charles Darwin, brought to life through synthetic interview technology. Explore his life, theories of evolution, and the public's reaction, with modern commentary from experts.

**Highlights:** Interactive interview with virtual Charles Darwin, Explore evolution principles and Darwin's life, Modern commentary from biology and other experts, Answers based on Darwin's writings and letters, Questions compiled from user interviews

**Features:** macOS Compatibility

**In-app purchases:** none


### Rachel Carson

[App page](https://appshunter.io/ios/app/rachel-carson/id1444471366)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Darwin Speaks free?

Darwin Speaks is free to download, with no in-app purchases.

### Is Rachel Carson free?

Rachel Carson costs $1.99, with no in-app purchases.

### Do Darwin Speaks or Rachel Carson have ads?

Neither Darwin Speaks nor Rachel Carson shows ads.

### Which is updated more often, Darwin Speaks or Rachel Carson?

Darwin Speaks ships an update every 51 months, and Rachel Carson every 26 months. Most recently, Darwin Speaks was updated on October 24, 2026 and Rachel Carson on September 27, 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.*