MoleculeSketch iP vs Molecular Constructor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MoleculeSketch iP
Easily draw chemical formulas and reactions with this intuitive application. It offers features like adding atoms, bonds, and functional groups, with advanced options available through an in-app purchase. Share your creations or import existing structures.
- Draw atoms and bonds
- Select various bond types
- Add functional groups
- Show missing hydrogen atoms
- Calculate molecular mass
- Import mol/sdf files
- Copy, paste, and cut drawings
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MoleculeSketch is a simple and easy to use drawing App for chemical formulas and reactions. MoleculeSketch iOS is the standalone version of MoleculeSketch for iPad. The free version offers basic functionality. The full version can be unlocked with an in-app purchase. It has following features: + add atoms and bonds nicely by position locking (can be disabled) + choose different bond types (double, stereochemical, delocalised, etc.) + add bonds with higher hapticity + type functional groups by double-clicking on symbol + show missing hydrogen atoms depending on free valences + "grow" and remove hydrogen atoms (*) + show non bonding electron pairs on heteroatoms + add reaction arrows and text fields + access drawing attributes from popover panels + calculate average mass and formula of molecules (*) + group and arrange objects (*) + change background color of drawing area and add a grid + copy/paste/cut molecules and drawings + paste drawings into other applications + import from mol/sdf files (*) + use gestures for zooming and rotation + import structures from mol- or sdf-files (*) (*) some of these features and others are only available when using the full version (inApp purchase)
Molecular Constructor
Create and optimize 3D molecular models. This free software allows users to design molecules and refine their geometry simultaneously. A more advanced desktop version is also available.
- Build molecules in 3D
- Design molecular structures
- Optimize geometry
- Free software
- Desktop version available
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Molecular Constructor is a free 3D modeling software for building molecules. Using this application user can design a molecule and optimize its geometry at the same time. The more advanced desktop version can be found at the project website: http://molconstr.com/
Screenshots
Verdict
The clearest difference is in-app purchases: Molecular Constructor at none against MoleculeSketch iP's 1. Molecular Constructor also leads on review sentiment (75% vs 50%) and ratings volume (65 vs 4). MoleculeSketch iP's advantage is rating (4.5 vs 4.0) and update cadence (every 2 months vs every 12 months). On price, ads and iOS requirement 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. MoleculeSketch iP sells 1 one-off in-app purchase. Molecular Constructor asks for nothing beyond the download.
MoleculeSketch iP holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Molecular Constructor has 65 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 50% of MoleculeSketch iP's written reviews are positive against 75% of Molecular Constructor's, so the app with the better star average is not the one people write more warmly about.
MoleculeSketch iP ships an update every 2 months, Molecular Constructor every 12 months. The most recent releases landed on October 11, 2026 and October 22, 2026 respectively.
| Parameter | MoleculeSketch iP | Molecular Constructor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | 4.0 (65 ratings) |
| Positive reviews | 50.0% of reviews | 75.0% of reviews — better |
| Number of ratings | 4 | 65 — better |
| Update frequency | Every 2 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 13 | 12.0 — better |
| Further details — not scored | ||
| Size | 59 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Dolder | Alexander Teplukhin |
Customer experience
MoleculeSketch iP
Molecular Constructor
In-app purchases
MoleculeSketch iP
- Full version$1.99
Molecular Constructor
No in-app purchases
Questions
Is MoleculeSketch iP free?
Is Molecular Constructor free?
Which has better reviews, MoleculeSketch iP or Molecular Constructor?
Do MoleculeSketch iP or Molecular Constructor have ads?
Which is updated more often, MoleculeSketch iP or Molecular Constructor?
Other comparisons
