# WebMO Premium vs Simple Orbit Simulator

The clearest difference is update cadence: Simple Orbit Simulator at every 3 days against WebMO Premium's every 17 months. Simple Orbit Simulator also leads on price ($0.99 vs $4.99). WebMO Premium's advantage is iOS requirement (12.0 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

WebMO Premium costs $4.99 and Simple Orbit Simulator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

WebMO Premium ships an update every 17 months, Simple Orbit Simulator every 3 days. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | WebMO Premium | Simple Orbit Simulator |
| --- | --- | --- |
| Price | $4.99 | **$0.99** |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/webmo-premium/id1448564335/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 12 MB | 9 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [WebMO, LLC](https://appshunter.io/developer/797898098) | [Bratislav Ljubisic](https://appshunter.io/developer/570434691) |

## What reviewers say

### 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


### Simple Orbit Simulator

[App page](https://appshunter.io/ios/app/simple-orbit-simulator/id6762567160)

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

**In-app purchases:** none


## Frequently asked questions

### Is WebMO Premium free?

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

### Is Simple Orbit Simulator free?

Simple Orbit Simulator costs $0.99, with no in-app purchases.

### Do WebMO Premium or Simple Orbit Simulator have ads?

Neither WebMO Premium nor Simple Orbit Simulator shows ads.

### Which is updated more often, WebMO Premium or Simple Orbit Simulator?

WebMO Premium ships an update every 17 months, and Simple Orbit Simulator every 3 days. Most recently, WebMO Premium was updated on September 19, 2026 and Simple Orbit Simulator on September 22, 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.*