# Tap OChem vs WebMO Molecule Editor

The clearest difference is price: WebMO Molecule Editor at Free against Tap OChem's $4.99. Tap OChem's advantage is rating (4.7 vs 4.0) and in-app purchases (none vs 2). On ratings volume, update cadence, ads and device support there is nothing between them.

WebMO Molecule Editor is free to download; Tap OChem costs $4.99 up front. WebMO Molecule Editor sells 2 one-off in-app purchases. Tap OChem asks for nothing beyond the download.

Tap OChem holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 39 and 40 respectively. Written reviews point the same way: 92% of Tap OChem's written reviews are positive against 60% of WebMO Molecule Editor's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Tap OChem | WebMO Molecule Editor |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.7 (39 ratings)](https://appshunter.io/ios/app/tap-ochem/id579861146/reviews)** | [4.0 (40 ratings)](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095/reviews) |
| Number of ratings | 39 | **40** |
| Positive reviews | **91.7% of reviews** | 60.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3.5 GB | 12 MB |
| Requires iOS | 13.2 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tap OChem, LLC](https://appshunter.io/developer/579861209) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## What reviewers say

### Tap OChem

[App page](https://appshunter.io/ios/app/tap-ochem/id579861146)

Visualize complex organic chemistry reactions and concepts with animated explanations. This app covers a wide range of undergraduate organic chemistry topics, aiding in exam preparation and understanding of molecular behavior.

**Highlights:** Animated organic chemistry reactions, Detailed concept explanations, Electron pushing diagrams, Full-color text descriptions, MCAT, PCAT, OAT, DAT prep, Regular content updates

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

**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 Tap OChem free?

Tap OChem costs $4.99, 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, Tap OChem or WebMO Molecule Editor?

Tap OChem is rated higher. Tap OChem averages 4.7 out of 5 from 39 ratings, while WebMO Molecule Editor averages 4.0 from 40 ratings.

### Do Tap OChem or WebMO Molecule Editor have ads?

Neither Tap OChem nor WebMO Molecule Editor shows ads.

### Which is updated more often, Tap OChem or WebMO Molecule Editor?

Tap OChem ships an update every 3 months, and WebMO Molecule Editor every 3 months. Most recently, Tap OChem was updated on September 23, 2026 and WebMO Molecule Editor 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.*