# Protein Guide vs Quantum

The clearest difference is in-app purchases: Protein Guide at none against Quantum's 6. Protein Guide also leads on iOS requirement (11.0 vs 26.0). Quantum's advantage is review sentiment (81% vs 50%) and update cadence (every 5 weeks vs every 9 months). On price, rating, ads and device support there is nothing between them.

Both are free to download. Quantum sells 3 one-off in-app purchases. Protein Guide asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Protein Guide against 4.8 for Quantum. Both are backed by a comparable volume of ratings — 45 and 151 respectively. Written reviews are what separate them: 50% of Protein Guide's written reviews are positive against 81% of Quantum's.

Protein Guide ships an update every 9 months, Quantum every 5 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Protein Guide | Quantum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (45 ratings)](https://appshunter.io/ios/app/protein-guide/id1375157917/reviews)** | [4.8 (151 ratings)](https://appshunter.io/ios/app/quantum-particle-life/id6504465371/reviews) |
| Number of ratings | 45 | **151** |
| Positive reviews | 50.0% of reviews | **81.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 224 MB | 32 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Axton Pitt](https://appshunter.io/developer/957165645) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## What reviewers say

### Protein Guide

[App page](https://appshunter.io/ios/app/protein-guide/id1375157917)

Explore the intricate stages of protein structure with detailed diagrams, explanations, and animations. This app serves as a valuable reference for both beginners and experienced individuals, offering insights into unique properties and biological functions.

**Highlights:** Detailed diagrams of protein structure, Explanations of protein stages, Animations of protein structures, Information on unique properties and functions, Example proteins demonstrating structural aspects, ClassKit integration for teachers

**Features:** macOS Compatibility

**In-app purchases:** none


### Quantum

[App page](https://appshunter.io/ios/app/quantum-particle-life/id6504465371)

Explore the hidden world of particles with a real-time simulator. Model up to 10,000 particles and experiment with natural phenomena like crystallization and orbital mechanics. Customize interactions and visualize results dynamically.

**Highlights:** Real-time particle simulation, Model up to 10,000 particles, Simulate natural phenomena, Four distinct particle classes, Customizable rules editor, Dynamic visualizations, Interactive control

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer tip | $1.99 | one-time |
| Developer tip | $3.99 | one-time |
| Developer tip | $5.99 | one-time |


## Frequently asked questions

### Is Protein Guide free?

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

### Is Quantum free?

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

### Which has better reviews, Protein Guide or Quantum?

Protein Guide is rated higher. Protein Guide averages 4.8 out of 5 from 45 ratings, while Quantum averages 4.8 from 151 ratings.

### Do Protein Guide or Quantum have ads?

Neither Protein Guide nor Quantum shows ads.

### Which is updated more often, Protein Guide or Quantum?

Protein Guide ships an update every 9 months, and Quantum every 5 weeks. Most recently, Protein Guide was updated on October 24, 2026 and Quantum on October 30, 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.*