# MARVLS vs Physics Constants Library

The clearest difference is in-app purchases: MARVLS at none against Physics Constants Library's 1. MARVLS also leads on ads (none vs shown) and update cadence (every 4 weeks vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Physics Constants Library sells 1 one-off in-app purchase. MARVLS asks for nothing beyond the download.

MARVLS ships an update every 4 weeks, Physics Constants Library every 7 months. The most recent releases landed on September 27, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | MARVLS | Physics Constants Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/marvls-quantum-computing/id6740221029/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 7 months |
| Monetization | Free | — |
| Size | 168 MB | 10 MB |
| Requires iOS | **18.0** | 18.4 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michele McColgan](https://appshunter.io/developer/1532617986) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### 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


### Physics Constants Library

[App page](https://appshunter.io/ios/app/physics-constants-library/id6751224343)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $2.99 | one-time |


## Frequently asked questions

### Is MARVLS free?

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

### Is Physics Constants Library free?

Physics Constants Library is free to download, with in-app purchases available.

### Do MARVLS or Physics Constants Library have ads?

Physics Constants Library shows ads; MARVLS does not.

### Which is updated more often, MARVLS or Physics Constants Library?

MARVLS ships an update every 4 weeks, and Physics Constants Library every 7 months. Most recently, MARVLS was updated on September 27, 2026 and Physics Constants Library on September 20, 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.*