# ODYSSEY VSEPR Theory vs WebMO Premium

The clearest difference is rating: ODYSSEY VSEPR Theory at 5.0 against WebMO Premium's 4.0. ODYSSEY VSEPR Theory also leads on price ($3.99 vs $4.99) and iOS requirement (9.0 vs 12.0). WebMO Premium's advantage is ratings volume (4 vs 1) and device support (3 vs 1). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

ODYSSEY VSEPR Theory costs $3.99 and WebMO Premium $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ODYSSEY VSEPR Theory holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

ODYSSEY VSEPR Theory ships an update every 14 months, WebMO Premium every 17 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ODYSSEY VSEPR Theory | WebMO Premium |
| --- | --- | --- |
| Price | **$3.99** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/odyssey-vsepr-theory/id869643629/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/webmo-premium/id1448564335/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 17 months |
| Monetization | Paid | Paid |
| Size | 23 MB | 12 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wavefunction, Inc](https://appshunter.io/developer/534726809) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## What reviewers say

### ODYSSEY VSEPR Theory

[App page](https://appshunter.io/ios/app/odyssey-vsepr-theory/id869643629)

Explore molecular shapes and VSEPR theory with interactive 3D models. Manipulate molecules, measure bond angles, and test your knowledge with quizzes. Ideal for visual learners in introductory chemistry.

**Highlights:** Interactive 3D molecular models, Adjustable model styles, Measure bond lengths and angles, Lone pair and dipole moment visualization, Multiple-choice quizzes, Glossary and comments section

**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 ODYSSEY VSEPR Theory free?

ODYSSEY VSEPR Theory costs $3.99, with no in-app purchases.

### Is WebMO Premium free?

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

### Which has better reviews, ODYSSEY VSEPR Theory or WebMO Premium?

ODYSSEY VSEPR Theory is rated higher. ODYSSEY VSEPR Theory averages 5.0 out of 5 from 1 ratings, while WebMO Premium averages 4.0 from 4 ratings.

### Do ODYSSEY VSEPR Theory or WebMO Premium have ads?

Neither ODYSSEY VSEPR Theory nor WebMO Premium shows ads.

### Which is updated more often, ODYSSEY VSEPR Theory or WebMO Premium?

ODYSSEY VSEPR Theory ships an update every 14 months, and WebMO Premium every 17 months. Most recently, ODYSSEY VSEPR Theory was updated on October 17, 2026 and WebMO Premium on October 7, 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.*