# F.A.S.T vs Quantum

The clearest difference is in-app purchases: F.A.S.T at none against Quantum's 6. F.A.S.T also leads on review sentiment (100% vs 81%) and iOS requirement (15.6 vs 26.0). Quantum's advantage is update cadence (every 5 weeks vs every 19 months) and ratings volume (151 vs 24). 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. F.A.S.T asks for nothing beyond the download.

Quantum holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Quantum has 151 ratings behind it against 24, so its average is the more settled of the two. Written reviews complicate that: 100% of F.A.S.T's written reviews are positive against 81% of Quantum's, so the app with the better star average is not the one people write more warmly about.

F.A.S.T ships an update every 19 months, Quantum every 5 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | F.A.S.T | Quantum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (24 ratings)](https://appshunter.io/ios/app/fast/id1217030092/reviews) | **[4.8 (151 ratings)](https://appshunter.io/ios/app/quantum-particle-life/id6504465371/reviews)** |
| Number of ratings | 24 | **151** |
| Positive reviews | **100.0% of reviews** | 81.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 32 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Philippe Zay](https://appshunter.io/developer/1200498230) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## What reviewers say

### F.A.S.T

[App page](https://appshunter.io/ios/app/fast/id1217030092)

Create and customize mesmerizing mathematical spirals, including Archimedean and logarithmic forms. Offers intuitive controls for precise adjustments to curvature, color, and patterns. Ideal for creative discovery and educational exploration.

**Highlights:** Archimedean & Logarithmic Spirals, Intuitive Controls, Dynamic Colorization, Expert Mode, Dark Mode Support, Cross-device Compatibility

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

**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 F.A.S.T free?

F.A.S.T 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, F.A.S.T or Quantum?

Quantum is rated higher. F.A.S.T averages 4.6 out of 5 from 24 ratings, while Quantum averages 4.8 from 151 ratings.

### Do F.A.S.T or Quantum have ads?

Neither F.A.S.T nor Quantum shows ads.

### Which is updated more often, F.A.S.T or Quantum?

F.A.S.T ships an update every 19 months, and Quantum every 5 weeks. Most recently, F.A.S.T 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.*