# MolecuLens vs Chembook

The clearest difference is iOS requirement: MolecuLens at 15.1 against Chembook's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. MolecuLens sells 2 in-app purchases, starting at $4.99 per month and Chembook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MolecuLens ships an update monthly, Chembook every 3 weeks. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | MolecuLens | Chembook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/moleculens/id6757090293/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 43 MB | 110 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jake Kinchen](https://appshunter.io/developer/1773423641) | [Hyuk-Yong Kwon](https://appshunter.io/developer/6796681340) |

## What reviewers say

### MolecuLens

[App page](https://appshunter.io/ios/app/moleculens/id6757090293)

Explore and learn about over 100 million chemical compounds in interactive 3D. AI-powered features generate guided tours, quizzes, and shareable diagrams to enhance understanding and communication.

**Highlights:** Interactive 2D/3D molecular viewing, AI-guided molecular tours and quizzes, Search by name, SMILES, formula, or drawing, Conformer generation, 3D orbital overlays (Pro feature), High-quality diagram generation (Pro feature)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MolecuLens Pro (Monthly) | $4.99 | per month |
| MolecuLens Pro (Yearly) | $24.99 | per year |


### Chembook

[App page](https://appshunter.io/ios/app/chembook-reaction-visualizer/id6796681338)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $6.99 | one-time |


## Frequently asked questions

### Is MolecuLens free?

MolecuLens is free to download, with in-app purchases available.

### Is Chembook free?

Chembook is free to download, with in-app purchases available.

### Do MolecuLens or Chembook have ads?

Neither MolecuLens nor Chembook shows ads.

### Which is updated more often, MolecuLens or Chembook?

MolecuLens ships an update monthly, and Chembook every 3 weeks. Most recently, MolecuLens was updated on October 5, 2026 and Chembook on October 15, 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.*