# iORA vs Heterocycles

The clearest difference is in-app purchases: iORA at none against Heterocycles's 1. iORA also leads on update cadence (every 2 months vs every 11 months) and ratings volume (12 vs 2). On price, rating, ads and device support there is nothing between them.

Both are free to download. Heterocycles sells 1 one-off in-app purchase. iORA asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for iORA against 5.0 for Heterocycles. That said, the two scores are not equally well evidenced: iORA has 12 ratings behind it against 2, so its average is the more settled of the two.

iORA ships an update every 2 months, Heterocycles every 11 months. The most recent releases landed on September 7, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | iORA | Heterocycles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (12 ratings)](https://appshunter.io/ios/app/iora-reaction-visualizer/id1609524913/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/heterocycles/id6445909269/reviews) |
| Number of ratings | **12** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 17 MB |
| Requires iOS | **14.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Ess](https://appshunter.io/developer/1609524915) | [Clarity Applications](https://appshunter.io/developer/1646120472) |

## 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


### Heterocycles

[App page](https://appshunter.io/ios/app/heterocycles/id6445909269)

Master the names and applications of organic chemistry's heterocycles. This interactive app covers over 75 compounds with hundreds of examples and personalized review modes. Track your progress with achievements and learn about their roles in medicine and biology.

**Highlights:** 75+ heterocycles, Hundreds of examples, Multiple practice modes, Personalized review, Reference table, Achievements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is iORA free?

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

### Is Heterocycles free?

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

### Which has better reviews, iORA or Heterocycles?

iORA and Heterocycles are both rated 5.0 out of 5 on the App Store, from 12 and 2 ratings respectively.

### Do iORA or Heterocycles have ads?

Neither iORA nor Heterocycles shows ads.

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

iORA ships an update every 2 months, and Heterocycles every 11 months. Most recently, iORA was updated on September 7, 2026 and Heterocycles on September 13, 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.*