# IsoDecibel vs SoundSim360

The clearest difference is in-app purchases: IsoDecibel at none against SoundSim360's 1. IsoDecibel also leads on iOS requirement (13.0 vs 16.4). SoundSim360's advantage is update cadence (every 3 weeks vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. SoundSim360 sells 1 in-app purchase, starting at $34.99 per month. IsoDecibel asks for nothing beyond the download.

IsoDecibel ships an update every 9 months, SoundSim360 every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | IsoDecibel | SoundSim360 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/isodecibel/id1670738247/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 10 MB | 66 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Emil Aerenlund](https://appshunter.io/developer/1645551094) | [Pronumerix AB](https://appshunter.io/developer/1882994835) |

## What reviewers say

### 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


### SoundSim360

[App page](https://appshunter.io/ios/app/soundsim360/id6760180092)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SoundSim360 Subscription | $34.99 | per month |


## Frequently asked questions

### Is IsoDecibel free?

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

### Is SoundSim360 free?

SoundSim360 is free to download, with in-app purchases available.

### Do IsoDecibel or SoundSim360 have ads?

Neither IsoDecibel nor SoundSim360 shows ads.

### Which is updated more often, IsoDecibel or SoundSim360?

IsoDecibel ships an update every 9 months, and SoundSim360 every 3 weeks. Most recently, IsoDecibel was updated on October 24, 2026 and SoundSim360 on October 28, 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.*