# Molecular Constructor vs WebMO Premium

The clearest difference is price: Molecular Constructor at Free against WebMO Premium's $4.99. Molecular Constructor also leads on ratings volume (52 vs 4) and review sentiment (75% vs 67%). On rating, update cadence, ads and in-app purchases there is nothing between them.

Molecular Constructor is free to download; WebMO Premium costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 3.9 for Molecular Constructor against 4.0 for WebMO Premium. That said, the two scores are not equally well evidenced: Molecular Constructor has 52 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 75% of Molecular Constructor's written reviews are positive against 67% of WebMO Premium's.

Molecular Constructor ships an update every 12 months, WebMO Premium every 17 months. The most recent releases landed on August 29, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Molecular Constructor | WebMO Premium |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/molecular-constructor/id1299401504/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/webmo-premium/id1448564335/reviews)** |
| Number of ratings | **52** | 4 |
| Positive reviews | **75.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 17 months |
| Monetization | **Free** | Paid |
| Size | 10 MB | 12 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Teplukhin](https://appshunter.io/developer/1299401503) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## What reviewers say

### 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


### WebMO Premium

[App page](https://appshunter.io/ios/app/webmo-premium/id1448564335)

This app allows users to build and visualize molecules in 3D, access chemical information from external databases, and interact with advanced computational chemistry programs. It's designed for students and faculty needing mobile access to molecular structures and data.

**Highlights:** 3D molecular editor, VSEPR and molecular mechanics optimization, Orbital and symmetry visualization, Chemical data lookup, Computational chemistry program integration, Spectra visualization

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

**In-app purchases:** none


## Frequently asked questions

### Is Molecular Constructor free?

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

### Is WebMO Premium free?

WebMO Premium costs $4.99, with no in-app purchases.

### Which has better reviews, Molecular Constructor or WebMO Premium?

WebMO Premium is rated higher. Molecular Constructor averages 3.9 out of 5 from 52 ratings, while WebMO Premium averages 4.0 from 4 ratings.

### Do Molecular Constructor or WebMO Premium have ads?

Neither Molecular Constructor nor WebMO Premium shows ads.

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

Molecular Constructor ships an update every 12 months, and WebMO Premium every 17 months. Most recently, Molecular Constructor was updated on August 29, 2026 and WebMO Premium on August 23, 2026.

---

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