# Chemistry By Design vs WebMO Molecule Editor

The clearest difference is rating: Chemistry By Design at 5.0 against WebMO Molecule Editor's 4.0. Chemistry By Design also leads on in-app purchases (none vs 2) and review sentiment (81% vs 60%). WebMO Molecule Editor's advantage is update cadence (every 3 months vs every 16 months). On price, ratings volume, ads and device support there is nothing between them.

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

Chemistry By Design holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 14 and 40 respectively. Written reviews point the same way: 81% of Chemistry By Design's written reviews are positive against 60% of WebMO Molecule Editor's.

Chemistry By Design ships an update every 16 months, WebMO Molecule Editor every 3 months. The most recent releases landed on November 4, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Chemistry By Design | WebMO Molecule Editor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (14 ratings)](https://appshunter.io/ios/app/chemistry-by-design-target-synthesis-database/id451791347/reviews)** | [4.0 (40 ratings)](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095/reviews) |
| Number of ratings | 14 | **40** |
| Positive reviews | **80.8% of reviews** | 60.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 12 MB |
| Requires iOS | **6.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University of Arizona](https://appshunter.io/developer/437682109) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## What reviewers say

### Chemistry By Design

[App page](https://appshunter.io/ios/app/chemistry-by-design-target-synthesis-database/id451791347)

This interactive virtual flashcard app helps students practice chemistry synthesis skills. It displays reagents, starting materials, and products for each step in constructing natural products or pharmaceuticals. Various browsing options are available for self-testing.

**Highlights:** Interactive virtual flashcards, Practice synthetic sequences, Display reagents, starting materials, and products, Natural product and pharmaceutical synthesis, Multiple browsing options for testing

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Chemistry By Design free?

Chemistry By Design is free to download, with no in-app purchases.

### Is WebMO Molecule Editor free?

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

### Which has better reviews, Chemistry By Design or WebMO Molecule Editor?

Chemistry By Design is rated higher. Chemistry By Design averages 5.0 out of 5 from 14 ratings, while WebMO Molecule Editor averages 4.0 from 40 ratings.

### Do Chemistry By Design or WebMO Molecule Editor have ads?

Neither Chemistry By Design nor WebMO Molecule Editor shows ads.

### Which is updated more often, Chemistry By Design or WebMO Molecule Editor?

Chemistry By Design ships an update every 16 months, and WebMO Molecule Editor every 3 months. Most recently, Chemistry By Design was updated on November 4, 2026 and WebMO Molecule Editor on November 1, 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.*