# BackendEngineer Questions vs Quantum

The clearest difference is price: Quantum at Free against BackendEngineer Questions's $7.99. BackendEngineer Questions's advantage is in-app purchases (none vs 6) and iOS requirement (16.0 vs 26.0). On ads and device support there is nothing between them.

Quantum is free to download; BackendEngineer Questions costs $7.99 up front. Quantum sells 3 one-off in-app purchases. BackendEngineer Questions asks for nothing beyond the download.

## The numbers

| Metric | BackendEngineer Questions | Quantum |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | — | **[4.8 (133 ratings)](https://appshunter.io/ios/app/quantum-particle-life/id6504465371/reviews)** |
| Number of ratings | — | **133** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 32 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Buydeepdiscount.com LLC](https://appshunter.io/developer/817177888) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## What reviewers say

### BackendEngineer Questions

[App page](https://appshunter.io/ios/app/backendengineer-questions/id6502676960)

**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 BackendEngineer Questions free?

BackendEngineer Questions costs $7.99, with no in-app purchases.

### Is Quantum free?

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

### Do BackendEngineer Questions or Quantum have ads?

Neither BackendEngineer Questions nor Quantum shows ads.

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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.*