# Building Acoustics Partner vs IsoDecibel

The clearest difference is update cadence: Building Acoustics Partner at every 4 months against IsoDecibel's every 9 months. IsoDecibel's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Building Acoustics Partner ships an update every 4 months, IsoDecibel every 9 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Building Acoustics Partner | IsoDecibel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/isodecibel/id1670738247/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | — | Free |
| Size | 210 MB | 10 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hottinger Bruel & Kjaer A/S](https://appshunter.io/developer/622515894) | [Emil Aerenlund](https://appshunter.io/developer/1645551094) |

## What reviewers say

### Building Acoustics Partner

[App page](https://appshunter.io/ios/app/building-acoustics-partner/id1487977751)

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

**In-app purchases:** none


### IsoDecibel

[App page](https://appshunter.io/ios/app/isodecibel/id1670738247)

This tool simplifies decibel calculations, allowing you to add, subtract, and average sound source levels. It's designed for ease of use and to provide an educational insight into acoustics.

**Highlights:** Add independent source levels, Subtract independent source levels, Calculate average of source levels, Sum up to 20 source levels, Educational insight into acoustics

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Building Acoustics Partner free?

Building Acoustics Partner is free to download, with no in-app purchases.

### Is IsoDecibel free?

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

### Do Building Acoustics Partner or IsoDecibel have ads?

Neither Building Acoustics Partner nor IsoDecibel shows ads.

### Which is updated more often, Building Acoustics Partner or IsoDecibel?

Building Acoustics Partner ships an update every 4 months, and IsoDecibel every 9 months. Most recently, Building Acoustics Partner was updated on October 29, 2026 and IsoDecibel 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.*