# WebMO Molecule Editor vs Molecular Constructor

The clearest difference is in-app purchases: Molecular Constructor at none against WebMO Molecule Editor's 2. Molecular Constructor also leads on review sentiment (75% vs 60%). WebMO Molecule Editor's advantage is update cadence (every 3 months vs every 12 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. WebMO Molecule Editor sells 2 one-off in-app purchases. Molecular Constructor asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.0 for WebMO Molecule Editor against 3.9 for Molecular Constructor. Both are backed by a comparable volume of ratings — 40 and 52 respectively. Written reviews are what separate them: 60% of WebMO Molecule Editor's written reviews are positive against 75% of Molecular Constructor's.

WebMO Molecule Editor ships an update every 3 months, Molecular Constructor every 12 months. The most recent releases landed on September 3, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | WebMO Molecule Editor | Molecular Constructor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (40 ratings)](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095/reviews)** | [3.9 (52 ratings)](https://appshunter.io/ios/app/molecular-constructor/id1299401504/reviews) |
| Number of ratings | 40 | **52** |
| Positive reviews | 60.4% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 10 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WebMO, LLC](https://appshunter.io/developer/797898098) | [Alexander Teplukhin](https://appshunter.io/developer/1299401503) |

## What reviewers say

### WebMO Molecule Editor

[App page](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095)

Create and explore 3D molecular structures, visualize chemical properties, and access extensive chemical databases. This tool is ideal for students and educators needing on-the-go access to molecular information and computational chemistry resources.

**Highlights:** 3D molecular editor, Structure optimization, Orbital and symmetry visualization, Chemical database lookup, Spectra visualization, High-resolution image capture, Computational chemistry program integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WebMO Premium for paid users | Free | one-time |
| WebMO Premium | $4.99 | one-time |


### Molecular Constructor

[App page](https://appshunter.io/ios/app/molecular-constructor/id1299401504)

Create and optimize 3D molecular models. This free software allows users to design molecules and refine their geometry simultaneously. A more advanced desktop version is also available.

**Highlights:** Build molecules in 3D, Design molecular structures, Optimize geometry, Free software, Desktop version available

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WebMO Molecule Editor free?

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

### Is Molecular Constructor free?

Molecular Constructor is free to download, with no in-app purchases.

### Which has better reviews, WebMO Molecule Editor or Molecular Constructor?

WebMO Molecule Editor is rated higher. WebMO Molecule Editor averages 4.0 out of 5 from 40 ratings, while Molecular Constructor averages 3.9 from 52 ratings.

### Do WebMO Molecule Editor or Molecular Constructor have ads?

Neither WebMO Molecule Editor nor Molecular Constructor shows ads.

### Which is updated more often, WebMO Molecule Editor or Molecular Constructor?

WebMO Molecule Editor ships an update every 3 months, and Molecular Constructor every 12 months. Most recently, WebMO Molecule Editor was updated on September 3, 2026 and Molecular Constructor on August 29, 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.*