# Napier's Bones Simulation vs Organisms & their Environment

The clearest difference is price: Organisms & their Environment at $0.99 against Napier's Bones Simulation's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Napier's Bones Simulation costs $1.99 and Organisms & their Environment $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Napier's Bones Simulation ships an update every 25 months, Organisms & their Environment every 31 months. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Napier's Bones Simulation | Organisms & their Environment |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/organisms-and-their-environment/id1209436017/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 25 months** | Every 31 months |
| Monetization | — | Paid |
| Size | 29 MB | 51 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) |

## What reviewers say

### Napier's Bones Simulation

[App page](https://appshunter.io/ios/app/napiers-bones-simulation/id1093899282)

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

**In-app purchases:** none


### Organisms & their Environment

[App page](https://appshunter.io/ios/app/organisms-and-their-environment/id1209436017)

An interactive educational app designed to teach students aged 11-15 about ecosystems, food chains, and environmental topics like pollution and deforestation through colorful visuals and hands-on activities.

**Highlights:** Learn about ecosystems and environmental topics, Interactive activities for practice, Quiz section to assess learning, Visual learning with colorful images, Covers food chain, water pollution, carbon cycle, deforestation, energy flow

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Napier's Bones Simulation free?

Napier's Bones Simulation costs $1.99, with no in-app purchases.

### Is Organisms & their Environment free?

Organisms & their Environment costs $0.99, with no in-app purchases.

### Do Napier's Bones Simulation or Organisms & their Environment have ads?

Neither Napier's Bones Simulation nor Organisms & their Environment shows ads.

### Which is updated more often, Napier's Bones Simulation or Organisms & their Environment?

Napier's Bones Simulation ships an update every 25 months, and Organisms & their Environment every 31 months. Most recently, Napier's Bones Simulation was updated on October 26, 2026 and Organisms & their Environment on October 29, 2026.

---

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