# 01dB Connect vs Noise Calc

The clearest difference is iOS requirement: 01dB Connect at 9.0 against Noise Calc's 15.1. On price, update cadence, 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.

01dB Connect ships an update every 8 months, Noise Calc every 11 months. The most recent releases landed on October 28, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 01dB Connect | Noise Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/noise-calc/id1556882174/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 11 months |
| Monetization | — | Free |
| Size | 42 MB | 39 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ACOEM Group](https://appshunter.io/developer/1495816959) | [Lorenzo Rizzi](https://appshunter.io/developer/856070642) |

## What reviewers say

### 01dB Connect

[App page](https://appshunter.io/ios/app/01db-connect/id1119115373)

**Features:** macOS Compatibility

**In-app purchases:** none


### Noise Calc

[App page](https://appshunter.io/ios/app/noise-calc/id1556882174)

This calculator estimates outdoor and semi-reverberant noise levels. It's designed for acoustic technicians and professionals dealing with machine noise, offering tools for logarithmic summation and difference, sound pressure attenuation, and noise reduction from barriers.

**Highlights:** Logarithmic summation of decibels, Logarithmic difference in decibels, Sound pressure attenuation with distance, Free-field sound propagation, Sound-insulating barrier noise reduction, Outdoor machinery noise compliance estimation

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

**In-app purchases:** none


## Frequently asked questions

### Is 01dB Connect free?

01dB Connect is free to download, with no in-app purchases.

### Is Noise Calc free?

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

### Do 01dB Connect or Noise Calc have ads?

Neither 01dB Connect nor Noise Calc shows ads.

### Which is updated more often, 01dB Connect or Noise Calc?

01dB Connect ships an update every 8 months, and Noise Calc every 11 months. Most recently, 01dB Connect was updated on October 28, 2026 and Noise Calc 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.*