# Organic Reactions vs Physiology Solution

The clearest difference is rating: Organic Reactions at 4.7 against Physiology Solution's 3.8. Organic Reactions also leads on ratings volume (170 vs 5). Physiology Solution's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 17.6). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Organic Reactions sells 2 one-off in-app purchases. Physiology Solution asks for nothing beyond the download.

Organic Reactions holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Organic Reactions has 170 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 68% of Organic Reactions's written reviews are positive against 67% of Physiology Solution's.

Organic Reactions ships an update every 10 months, Physiology Solution every 7 months. The most recent releases landed on October 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Organic Reactions | Physiology Solution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (170 ratings)](https://appshunter.io/ios/app/organic-reactions/id1184085187/reviews)** | [3.8 (5 ratings)](https://appshunter.io/ios/app/physiology-solution/id1455306712/reviews) |
| Number of ratings | **170** | 5 |
| Positive reviews | **68.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 7 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 3 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Florent Breton](https://appshunter.io/developer/1184085186) | [Quantum Quasar Infoworld LLP](https://appshunter.io/developer/1095005974) |

## What reviewers say

### Organic Reactions

[App page](https://appshunter.io/ios/app/organic-reactions/id1184085187)

Access key functional group reactions and their mechanisms in organic chemistry. Quickly find links between reactants and products, including synthesis and protection reactions. Some advanced features and reaction lists require an additional purchase.

**Highlights:** Functional group reactions, Reaction mechanisms, Reactant-product links, Synthesis reactions, Protection reactions

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month subscription | $0.99 | one-time |
| Full App | $4.99 | one-time |


### Physiology Solution

[App page](https://appshunter.io/ios/app/physiology-solution/id1455306712)

Explore comprehensive information on human physiology, drawing from established medical texts. This educational tool provides key concepts and figures for learning purposes.

**Highlights:** Human physiology content, Based on Guyton and Ganong, Educational figures and text, Comprehensive information

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Organic Reactions free?

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

### Is Physiology Solution free?

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

### Which has better reviews, Organic Reactions or Physiology Solution?

Organic Reactions is rated higher. Organic Reactions averages 4.7 out of 5 from 170 ratings, while Physiology Solution averages 3.8 from 5 ratings.

### Do Organic Reactions or Physiology Solution have ads?

Neither Organic Reactions nor Physiology Solution shows ads.

### Which is updated more often, Organic Reactions or Physiology Solution?

Organic Reactions ships an update every 10 months, and Physiology Solution every 7 months. Most recently, Organic Reactions was updated on October 22, 2026 and Physiology Solution on September 24, 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.*