# Quantum Quack vs Decibel Meter & Dosimeter

The clearest difference is rating: Quantum Quack at 5.0 against Decibel Meter & Dosimeter's 4.1. Quantum Quack also leads on in-app purchases (none vs 3) and iOS requirement (15.0 vs 17.0). Decibel Meter & Dosimeter's advantage is update cadence (every 3 weeks vs every 3 months) and ratings volume (18 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Decibel Meter & Dosimeter sells 3 in-app purchases, starting at $0.99 per 7 days. Quantum Quack asks for nothing beyond the download.

Quantum Quack holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Decibel Meter & Dosimeter has 18 ratings behind it against 1, so its average is the more settled of the two.

Quantum Quack ships an update every 3 months, Decibel Meter & Dosimeter every 3 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Quantum Quack | Decibel Meter & Dosimeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quantum-quack/id6630387948/reviews)** | [4.1 (18 ratings)](https://appshunter.io/ios/app/decibel-meter-and-dosimeter/id6740248468/reviews) |
| Number of ratings | 1 | **18** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Freemium |
| Size | 1 MB | 23 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Morgan Facchin](https://appshunter.io/developer/1762455635) | [Mobile Card Games & Travel Apps LLC](https://appshunter.io/developer/453389232) |

## What reviewers say

### Quantum Quack

[App page](https://appshunter.io/ios/app/quantum-quack/id6630387948)

This app generates decisions from a list of options using quantum random numbers derived from camera light fluctuations. It explores two interpretations of quantum mechanics: Copenhagen, where you escape determinism, and Many-Worlds, where you experience all options simultaneously. Shortcuts are available for common entries like yes/no or directions.

**Highlights:** Quantum random number generation, Decision making from user-defined lists, Copenhagen Interpretation explanation, Many-Worlds Interpretation explanation, Uses phone camera for randomness, Shortcuts for common entries

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

**In-app purchases:** none


### Decibel Meter & Dosimeter

[App page](https://appshunter.io/ios/app/decibel-meter-and-dosimeter/id6740248468)

This app transforms your iPhone into a professional sound level meter. It provides real-time decibel monitoring, instant feedback on noise intensity, and smart notifications for safety limits. Track your noise exposure over time with detailed history and exportable reports.

**Highlights:** Real-time decibel monitoring, Noise exposure limit tracking, Detailed noise history, Exportable reports, Smart notifications, Professional calibration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Annual Subscription | $24.99 | per year |
| Pro - NIOSH Noise Exposure | $4.99 | one-time |


## Frequently asked questions

### Is Quantum Quack free?

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

### Is Decibel Meter & Dosimeter free?

Decibel Meter & Dosimeter is free to download, with in-app purchases available.

### Which has better reviews, Quantum Quack or Decibel Meter & Dosimeter?

Quantum Quack is rated higher. Quantum Quack averages 5.0 out of 5 from 1 ratings, while Decibel Meter & Dosimeter averages 4.1 from 18 ratings.

### Do Quantum Quack or Decibel Meter & Dosimeter have ads?

Neither Quantum Quack nor Decibel Meter & Dosimeter shows ads.

### Which is updated more often, Quantum Quack or Decibel Meter & Dosimeter?

Quantum Quack ships an update every 3 months, and Decibel Meter & Dosimeter every 3 weeks. Most recently, Quantum Quack was updated on October 27, 2026 and Decibel Meter & Dosimeter 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.*