WebMO Molecule Editor vs Chem Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WebMO Molecule Editor
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.
- 3D molecular editor
- Structure optimization
- Orbital and symmetry visualization
- Chemical database lookup
- Spectra visualization
- High-resolution image capture
- Computational chemistry program integration
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WebMO allows users to build and view molecules in 3-D, visualize orbitals and symmetry elements, lookup chemical information and properties from external databases, and access state-of-the-art computational chemistry programs. WebMO is recommended for students and faculty in high school, college, and graduate school who desire mobile access to molecular structures, information, and calculations. WebMO capabilities include: - Build molecules by drawing atoms and bonds in a 3-D molecular editor, or by speaking the name (e.g., “aspirin”) - Optimize structures using VSEPR theory or molecular mechanics - View Huckel molecular orbitals, electron density, and electrostatic potential - View molecular vibrations - View point group and symmetry elements of molecules - Lookup basic molecular information, including IUPAC and common names, stoichiometry, molar mass - Lookup chemical data from PubChem and ChemSpider - Lookup experimental and predicted molecular properties from external databases (NIST, Sigma-Aldrich) - Lookup IR, UV-VIS, NMR, and mass spectra from external databases (NIST, SDBS) - Capture high-resolution molecular images - Save and recall molecular structures locally - Export and import structures via email WebMO is also a front-end to WebMO servers (version 14 and higher): - Supports Gaussian, GAMESS, Molpro, MOPAC, NWChem, ORCA, PQS, PSI, Quantum Espresso, VASP, Q-Chem, and Tinker computational chemistry programs - Submit, monitor, and view calculations - View formatted tabular data extracted from output files, as well as raw output - Visualize geometry, partial charges, dipole moment, normal vibrational modes, molecular orbitals, and NMR/IR/UV-VIS spectra
Chem Viewer
Visualize chemical compounds in 2D and 3D with this app. Access over 3 million compounds from the PubChem database and interact with 3D models using touch gestures. Ideal for students, researchers, and educators.
- 2D and 3D chemical views
- Access to 3+ million compounds
- PubChem database integration
- Interactive 3D model manipulation
- Suitable for students and researchers
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View molecules on the go with Chem Viewer! Supporting two-dimensional and three-dimensional views Chem Viewer can visualize more than 3 million compounds from the PubChem database. Interact with 3d models using your fingers! Great for students, researchers, and educators.
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Verdict
The clearest difference is in-app purchases: Chem Viewer at none against WebMO Molecule Editor's 2. Chem Viewer also leads on update cadence (every 4 days vs every 3 months). WebMO Molecule Editor's advantage is ads (none vs shown) and ratings volume (40 vs 4). On price, rating, review sentiment and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. WebMO Molecule Editor sells 2 one-off in-app purchases. Chem Viewer asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.0 for WebMO Molecule Editor against 4.0 for Chem Viewer. That said, the two scores are not equally well evidenced: WebMO Molecule Editor has 40 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 60% of WebMO Molecule Editor's written reviews are positive against 67% of Chem Viewer's.
WebMO Molecule Editor ships an update every 3 months, Chem Viewer every 4 days. The most recent releases landed on September 3, 2026 and September 8, 2026 respectively.
| Parameter | WebMO Molecule Editor | Chem Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (40 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 60.4% of reviews | 66.7% of reviews — better |
| Number of ratings | 40 — better | 4 |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | WebMO, LLC | Dylan Riffle |
Customer experience
WebMO Molecule Editor
Chem Viewer
In-app purchases
WebMO Molecule Editor
- WebMO Premium for paid usersFree
- WebMO Premium$4.99
Chem Viewer
No in-app purchases
Questions
Is WebMO Molecule Editor free?
Is Chem Viewer free?
Which has better reviews, WebMO Molecule Editor or Chem Viewer?
Do WebMO Molecule Editor or Chem Viewer have ads?
Which is updated more often, WebMO Molecule Editor or Chem Viewer?
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