# gravity detector vs MARVLS

The clearest difference is rating: gravity detector at 5.0 against MARVLS's 3.7. gravity detector also leads on iOS requirement (11.0 vs 18.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

gravity detector holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

## The numbers

| Metric | gravity detector | MARVLS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/gravity-detector/id1480160202/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/marvls-quantum-computing/id6740221029/reviews) |
| Number of ratings | **4** | 3 |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 weeks |
| Monetization | Free | Free |
| Size | 18 MB | 168 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [乃君 黄](https://appshunter.io/developer/1337343608) | [Michele McColgan](https://appshunter.io/developer/1532617986) |

## What reviewers say

### gravity detector

[App page](https://appshunter.io/ios/app/gravity-detector/id1480160202)

Measure the G-force experienced in elevators or planes and compare it to planetary gravity. Record environmental photos, videos, and coordinates to save for later reference, and view G-values on a map.

**Highlights:** Measure G-force in real-time, Compare G-force to planetary gravity, Record environmental photos and videos, Save location coordinates, View G-values on a map

**In-app purchases:** none


### MARVLS

[App page](https://appshunter.io/ios/app/marvls-quantum-computing/id6740221029)

Explore quantum computing concepts through interactive augmented reality models. Requires a Merge Cube to visualize and manipulate topics like superposition and entanglement. Navigate through various educational modules to deepen your understanding.

**Highlights:** Augmented reality visualization, Interactive quantum concepts, Merge Cube integration, Topics: superposition, entanglement, qubits, Logic gates visualization, Nuclear and electron spin models

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is gravity detector free?

gravity detector is free to download, with no in-app purchases.

### Is MARVLS free?

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

### Which has better reviews, gravity detector or MARVLS?

gravity detector is rated higher. gravity detector averages 5.0 out of 5 from 4 ratings, while MARVLS averages 3.7 from 3 ratings.

### Do gravity detector or MARVLS have ads?

Neither gravity detector nor MARVLS 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.*