# ChemiCalc vs WebMO Premium

The clearest difference is rating: ChemiCalc at 5.0 against WebMO Premium's 4.0. ChemiCalc also leads on review sentiment (100% vs 67%) and price ($0.99 vs $4.99). WebMO Premium's advantage is update cadence (every 17 months vs every 38 months) and iOS requirement (12.0 vs 15.6). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

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

ChemiCalc holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 100% of ChemiCalc's written reviews are positive against 67% of WebMO Premium's.

ChemiCalc ships an update every 38 months, WebMO Premium every 17 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | ChemiCalc | WebMO Premium |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chemicalc/id819641904/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/webmo-premium/id1448564335/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 17 months** |
| Monetization | Paid | Paid |
| Size | 4 MB | 12 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rhodium Inc.](https://appshunter.io/developer/819641907) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## What reviewers say

### ChemiCalc

[App page](https://appshunter.io/ios/app/chemicalc/id819641904)

This app simplifies unit conversions for chemistry and physics, offering simultaneous views of converted values for energy, wavelength, and frequency. It includes essential formulas and fundamental constants for quantum mechanics, making it a valuable tool for students and educators.

**Highlights:** Unit conversion for chemistry and physics, Simultaneous value display, Energy, wavelength, and frequency conversion, Quantum mechanics formulas, Fundamental constants included

**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 ChemiCalc free?

ChemiCalc costs $0.99, with no in-app purchases.

### Is WebMO Premium free?

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

### Which has better reviews, ChemiCalc or WebMO Premium?

ChemiCalc is rated higher. ChemiCalc averages 5.0 out of 5 from 2 ratings, while WebMO Premium averages 4.0 from 4 ratings.

### Do ChemiCalc or WebMO Premium have ads?

Neither ChemiCalc nor WebMO Premium shows ads.

### Which is updated more often, ChemiCalc or WebMO Premium?

ChemiCalc ships an update every 38 months, and WebMO Premium every 17 months. Most recently, ChemiCalc was updated on November 1, 2026 and WebMO Premium on November 2, 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.*