# iORA vs MARVLS

The clearest difference is device support: iORA at 3 against MARVLS's 1. iORA also leads on iOS requirement (14.3 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iORA ships an update every 2 months, MARVLS every 4 months. The most recent releases landed on October 9, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | iORA | MARVLS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/iora-reaction-visualizer/id1609524913/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 40 MB | 242 MB |
| Requires iOS | **14.3** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Daniel Ess](https://appshunter.io/developer/1609524915) | [Michele McColgan](https://appshunter.io/developer/1532617986) |

## What reviewers say

### iORA

[App page](https://appshunter.io/ios/app/iora-reaction-visualizer/id1609524913)

Visualize chemical reactions in 3D using quantum-mechanical simulations. This free, interactive application makes complex chemistry concepts accessible and engaging for learners.

**Highlights:** 3D chemical reaction visualization, Quantum-mechanical simulations, Interactive learning, Easy to use interface, Educational tool

**Features:** macOS Compatibility

**In-app purchases:** none


### MARVLS

[App page](https://appshunter.io/ios/app/marvls-physics-i-mechanics/id6475370470)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iORA free?

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

### Is MARVLS free?

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

### Do iORA or MARVLS have ads?

Neither iORA nor MARVLS shows ads.

### Which is updated more often, iORA or MARVLS?

iORA ships an update every 2 months, and MARVLS every 4 months. Most recently, iORA was updated on October 9, 2026 and MARVLS on October 27, 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.*