# Molecule World vs Earthworm Anatomy

The clearest difference is price: Molecule World at Free against Earthworm Anatomy's $1.99. Molecule World also leads on update cadence (every 2 months vs every 36 months). Earthworm Anatomy's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 17.6). On ads and device support there is nothing between them.

Molecule World is free to download; Earthworm Anatomy costs $1.99 up front. Molecule World sells 1 one-off in-app purchase. Earthworm Anatomy asks for nothing beyond the download.

Molecule World ships an update every 2 months, Earthworm Anatomy every 36 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Molecule World | Earthworm Anatomy |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/molecule-world/id863565223/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 36 months |
| Monetization | Paid | — |
| Size | 16 MB | 57 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad, Mac | iPad, Mac, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Digital World Biology LLC](https://appshunter.io/developer/863565226) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Molecule World

[App page](https://appshunter.io/ios/app/molecule-world/id863565223)

Explore interactive 3D models of molecules, proteins, and DNA. This educational tool allows users to manipulate structures, experiment with visualization styles, and learn about chemical properties. Ideal for students and science enthusiasts of all ages.

**Highlights:** Interactive 3D molecule manipulation, Experiment with drawing and coloring styles, View and control molecular sequences (protein, DNA, RNA), Identify elements and investigate molecular properties, Capture images of molecular structures, Explore themed collections of molecules

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Molecule World Pro | $29.99 | one-time |


### Earthworm Anatomy

[App page](https://appshunter.io/ios/app/earthworm-anatomy/id1291969799)

**In-app purchases:** none


## Frequently asked questions

### Is Molecule World free?

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

### Is Earthworm Anatomy free?

Earthworm Anatomy costs $1.99, with no in-app purchases.

### Do Molecule World or Earthworm Anatomy have ads?

Neither Molecule World nor Earthworm Anatomy shows ads.

### Which is updated more often, Molecule World or Earthworm Anatomy?

Molecule World ships an update every 2 months, and Earthworm Anatomy every 36 months. Most recently, Molecule World was updated on October 24, 2026 and Earthworm Anatomy on October 6, 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.*