# Ecological Pyramid vs Rachel Carson

The clearest difference is update cadence: Ecological Pyramid at every 13 months against Rachel Carson's every 26 months. Ecological Pyramid also leads on price ($0.99 vs $1.99) and iOS requirement (12.0 vs 15.6). Rachel Carson's advantage is device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Ecological Pyramid costs $0.99 and Rachel Carson $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ecological Pyramid ships an update every 13 months, Rachel Carson every 26 months. The most recent releases landed on October 20, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Ecological Pyramid | Rachel Carson |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/ecological-pyramid/id1002379515/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 13 months** | Every 26 months |
| Monetization | Paid | — |
| Size | 76 MB | 36 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPad, Mac, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Ecological Pyramid

[App page](https://appshunter.io/ios/app/ecological-pyramid/id1002379515)

This app uses animation to teach children about Earth's ecosystems, food chains, and the hierarchy of life. It offers interactive elements to test understanding of ecological pyramids and food chain processes.

**Highlights:** Animated food chain explanations, Detailed theory on ecological pyramids, Interactive ecosystem exploration, Food chain hierarchy assessment, K12 adaptive learning model

**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 Ecological Pyramid free?

Ecological Pyramid costs $0.99, with no in-app purchases.

### Is Rachel Carson free?

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

### Do Ecological Pyramid or Rachel Carson have ads?

Neither Ecological Pyramid nor Rachel Carson shows ads.

### Which is updated more often, Ecological Pyramid or Rachel Carson?

Ecological Pyramid ships an update every 13 months, and Rachel Carson every 26 months. Most recently, Ecological Pyramid was updated on October 20, 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.*