# Ket Steps vs Quantum Atlas

The clearest difference is in-app purchases: Ket Steps at none against Quantum Atlas's 1. Quantum Atlas's advantage is iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Quantum Atlas sells 1 one-off in-app purchase. Ket Steps asks for nothing beyond the download.

## The numbers

| Metric | Ket Steps | Quantum Atlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quantum-atlas/id6771914560/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | — | Free |
| Size | 7 MB | 37 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [YARON AMIR BENJAMIN DR. GOLDSTEIN](https://appshunter.io/developer/1850455880) | [Elisha Perelman](https://appshunter.io/developer/6771914562) |

## What reviewers say

### Ket Steps

[App page](https://appshunter.io/ios/app/ket-steps/id6762529698)

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

**In-app purchases:** none


### Quantum Atlas

[App page](https://appshunter.io/ios/app/quantum-atlas/id6771914560)

Explore the fundamental building blocks of reality with interactive simulations and clear explanations of quantum physics concepts. This pocket-sized reference makes complex theories accessible through a particle table, concept cards, and hands-on experiments.

**Highlights:** Interactive particle table, 12 concept cards for quick learning, 22 touchable physics simulations, Theory atlases for deeper understanding, Decay and Spectra explorers, Offline and private usage

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quantum Atlas Pro | $2.99 | one-time |


## Frequently asked questions

### Is Ket Steps free?

Ket Steps is free to download, with no in-app purchases.

### Is Quantum Atlas free?

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

### Do Ket Steps or Quantum Atlas have ads?

Neither Ket Steps nor Quantum Atlas shows ads.

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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.*