# IsoDecibel — A simple decibel calculator

> Decibel calculator for adding, subtracting, and averaging sound source levels. (iPhone/iPad app by Emil Aerenlund.)

- Source: https://appshunter.io/ios/app/isodecibel/id1670738247 (this page in markdown: same URL + `.md`)
- Developer: [Emil Aerenlund](https://appshunter.io/developer/1645551094)
- Category: Utilities, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 10 MB
- Languages: American English
- Released: 2023-02-13
- Data updated: 2026-08-13
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/isodecibel/id1670738247/reviews.md

## What is IsoDecibel?

IsoDecibel is a simple and easy-to-use decibel calculator tool, for adding and subtracting independent source levels.
IsoDecibel also provides the user with an option to calculate the average of source levels. The user has the ability to find the average and also the sum of up to 20 source levels. The calculator is designed to be easy-to-use, and also as an educational software that gives the user an insight into the field of Acoustics.

## Key features

- Add independent source levels
- Subtract independent source levels
- Calculate average of source levels
- Sum up to 20 source levels
- Educational insight into acoustics


## Frequently asked questions about IsoDecibel

### What can IsoDecibel calculate?

IsoDecibel can calculate the addition and subtraction of independent source levels. It also allows users to find the average and sum of up to 20 source levels.

### Is IsoDecibel free to use?

Yes, IsoDecibel is completely free to download and use. It does not feature any in-app purchases or advertisements.

### What devices is IsoDecibel compatible with?

IsoDecibel is compatible with iPhone, iPad, and iPod devices. It is designed for the iOS platform.

### How often is IsoDecibel updated?

The latest version of IsoDecibel is 1.1.1, which was last updated on November 12, 2023. Updates typically address bug fixes and feature enhancements.

### What is the age rating for IsoDecibel?

IsoDecibel has an age rating of 4+, making it suitable for a wide range of users including children and adults.

### Does IsoDecibel offer advanced acoustic analysis features?

IsoDecibel is designed as a simple calculator for decibel levels. While it provides an educational insight into acoustics, it does not offer advanced analysis features like spectrum analysis.

### Can IsoDecibel be used offline?

As IsoDecibel is a calculation tool, it does not require an internet connection to perform its core functions. You can use it offline to perform decibel calculations.

## Version history (last 2 releases)

### 1.1.1 — 2023-11-12

New Content:
- Added a navigation bar at the bottom for easier access to the calculation modules

Fixed:
- Fixed an issue where the Summation and Average calculator would perform wrong calculations with low input values.

### 1.0.1 — 2023-02-13

No release notes.

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## More apps by Emil Aerenlund

- [IsoCal](https://appshunter.io/ios/app/isocal/id1645551092)

All apps by Emil Aerenlund: https://appshunter.io/developer/1645551094

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*