# Atomizer AR vs Chembook

The clearest difference is device support: Atomizer AR at 6 against Chembook's 2. Atomizer AR also leads on iOS requirement (15.2 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Atomizer AR sells 4 in-app purchases, starting at $1.99 per month and Chembook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Atomizer AR ships an update every 4 weeks, Chembook every 3 weeks. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Atomizer AR | Chembook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/atomizer-ar-quantum-chemistry/id6449015706/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 137 MB | 110 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wonmo Seong](https://appshunter.io/developer/1625011193) | [Hyuk-Yong Kwon](https://appshunter.io/developer/6796681340) |

## What reviewers say

### Atomizer AR

[App page](https://appshunter.io/ios/app/atomizer-ar-quantum-chemistry/id6449015706)

Explore the quantum world with interactive 3D models of atoms and molecules in augmented reality. Visualize atomic and molecular orbitals, and sketch organic compounds to instantly generate their nomenclature.

**Highlights:** 3D atomic and molecular orbital visualization, Augmented reality integration, Hartree-Fock computational method for MOs, Sketch organic compounds, Automatic SMILES and IUPAC nomenclature generation

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Californium Pass | $1.99 | per month |
| Californium Pass | $2.99 | per month |
| Einsteinium Pass | $3.99 | per year |
| Einsteinium Pass | $6.99 | per month |


### 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 Atomizer AR free?

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

### Is Chembook free?

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

### Do Atomizer AR or Chembook have ads?

Neither Atomizer AR nor Chembook shows ads.

### Which is updated more often, Atomizer AR or Chembook?

Atomizer AR ships an update every 4 weeks, and Chembook every 3 weeks. Most recently, Atomizer AR was updated on October 20, 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.*