# Turtle Universe vs Molecule Simulator

The clearest difference is review sentiment: Molecule Simulator at 100% against Turtle Universe's 67%. Turtle Universe's advantage is rating (4.6 vs 4.3) and update cadence (every 6 weeks vs every 4 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Turtle Universe holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 45 and 24 respectively. Written reviews complicate that: 67% of Turtle Universe's written reviews are positive against 100% of Molecule Simulator's, so the app with the better star average is not the one people write more warmly about.

Turtle Universe ships an update every 6 weeks, Molecule Simulator every 4 months. The most recent releases landed on July 29, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Turtle Universe | Molecule Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (45 ratings)](https://appshunter.io/ios/app/turtle-universe/id1455235317/reviews)** | [4.3 (24 ratings)](https://appshunter.io/ios/app/molecule-simulator/id1538249996/reviews) |
| Number of ratings | **45** | 24 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 120 MB | 8 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Turtle Sim LLC](https://appshunter.io/developer/1568741108) | [仕清 刘](https://appshunter.io/developer/1531464103) |

## What reviewers say

### Turtle Universe

[App page](https://appshunter.io/ios/app/turtle-universe/id1455235317)

Explore and learn about scientific phenomena through interactive microworlds. Create your own simulations using text or blocks, and engage with a global community of young learners. Discover over 100 scientific models and create computational art and games.

**Highlights:** Explore 100+ scientific models, Create custom microworlds, Code with text or blocks, Investigate phenomena, Engage in global discussions, Create computational art and games

**Features:** macOS Compatibility

**In-app purchases:** none


### Molecule Simulator

[App page](https://appshunter.io/ios/app/molecule-simulator/id1538249996)

Visualize the 3D structures of molecules using data from PubChem and Protein Data Bank. Explore molecules in various viewing modes and download an extensive library of compounds.

**Highlights:** 3D molecular visualization, Space filling mode, Ball-and-stick mode, Data from PubChem, Data from Protein Data Bank, Downloadable molecule library

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Turtle Universe free?

Turtle Universe is free to download, with no in-app purchases.

### Is Molecule Simulator free?

Molecule Simulator is free to download, with no in-app purchases.

### Which has better reviews, Turtle Universe or Molecule Simulator?

Turtle Universe is rated higher. Turtle Universe averages 4.6 out of 5 from 45 ratings, while Molecule Simulator averages 4.3 from 24 ratings.

### Do Turtle Universe or Molecule Simulator have ads?

Neither Turtle Universe nor Molecule Simulator shows ads.

### Which is updated more often, Turtle Universe or Molecule Simulator?

Turtle Universe ships an update every 6 weeks, and Molecule Simulator every 4 months. Most recently, Turtle Universe was updated on July 29, 2026 and Molecule Simulator on September 21, 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.*