# Decibel calculator vs Dustlight

The clearest difference is review sentiment: Dustlight at 100% against Decibel calculator's 50%. Dustlight also leads on price (Free vs $0.99) and update cadence (every 5 weeks vs every 17 months). Decibel calculator's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Dustlight is free to download; Decibel calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Decibel calculator ships an update every 17 months, Dustlight every 5 weeks. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Decibel calculator | Dustlight |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 109 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZPP](https://appshunter.io/developer/496124117) | [Latai](https://appshunter.io/developer/1702237370) |

## What reviewers say

### Decibel calculator

[App page](https://appshunter.io/ios/app/decibel-calculator/id496124114)

Easily add and subtract sound levels expressed in decibels (dB). This utility converts dB values to a linear scale for accurate calculations, demonstrating how sound levels combine.

**Highlights:** Add decibel levels, Subtract decibel levels, Convert dB to linear scale, Logarithmic scale calculations, Demonstrates dB addition examples

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

**In-app purchases:** none


### Dustlight

[App page](https://appshunter.io/ios/app/dustlight/id6475342016)

This app monitors airborne particles in real-time, alerting users to dangerous levels of fine dust. It offers customizable alerts, data analysis, and cloud storage for health protection in industrial and construction environments.

**Highlights:** Real-time dust monitoring, Customizable alerts and thresholds, Cloud data storage and backup, Detailed data analysis on smartphone, Flexible operating modes, Over-the-air device updates

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Decibel calculator free?

Decibel calculator costs $0.99, with no in-app purchases.

### Is Dustlight free?

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

### Do Decibel calculator or Dustlight have ads?

Neither Decibel calculator nor Dustlight shows ads.

### Which is updated more often, Decibel calculator or Dustlight?

Decibel calculator ships an update every 17 months, and Dustlight every 5 weeks. Most recently, Decibel calculator was updated on October 8, 2026 and Dustlight on October 10, 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.*