# CosmoCalc vs Quantum

The clearest difference is in-app purchases: CosmoCalc at none against Quantum's 6. CosmoCalc also leads on review sentiment (100% vs 81%) and iOS requirement (9.0 vs 26.0). Quantum's advantage is update cadence (every 5 weeks vs every 6 months) and ratings volume (150 vs 4). 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. CosmoCalc asks for nothing beyond the download.

CosmoCalc holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Quantum has 150 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of CosmoCalc's written reviews are positive against 81% of Quantum's.

CosmoCalc ships an update every 6 months, Quantum every 5 weeks. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CosmoCalc | Quantum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/cosmocalc/id334569654/reviews)** | [4.8 (150 ratings)](https://appshunter.io/ios/app/quantum-particle-life/id6504465371/reviews) |
| Number of ratings | 4 | **150** |
| Positive reviews | **100.0% of reviews** | 81.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 32 MB |
| Requires iOS | **9.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eli Rykoff](https://appshunter.io/developer/318275933) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## What reviewers say

### CosmoCalc

[App page](https://appshunter.io/ios/app/cosmocalc/id334569654)

This app calculates astronomical distances and scales based on user-selected cosmological parameters. It offers a simple interface for astronomers, students, and enthusiasts to quickly determine various cosmic measurements.

**Highlights:** Select cosmological parameters (H0, Ωm, ΩΛ), Choose from common reference cosmologies, Calculate luminosity distance, Determine angular diameter distance, Calculate lookback time, Find age of the Universe, Compute comoving volume and critical density

**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 CosmoCalc free?

CosmoCalc 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, CosmoCalc or Quantum?

CosmoCalc is rated higher. CosmoCalc averages 5.0 out of 5 from 4 ratings, while Quantum averages 4.8 from 150 ratings.

### Do CosmoCalc or Quantum have ads?

Neither CosmoCalc nor Quantum shows ads.

### Which is updated more often, CosmoCalc or Quantum?

CosmoCalc ships an update every 6 months, and Quantum every 5 weeks. Most recently, CosmoCalc was updated on October 6, 2026 and Quantum on October 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.*