# iSPEX — The spectrometer companion app

> Smartphone light analyzer for spectrum and polarization with hardware add-on. (iPhone/iPad app by DDQ.)

- Source: https://appshunter.io/ios/app/ispex/id584360175 (this page in markdown: same URL + `.md`)
- Developer: [DDQ](https://appshunter.io/developer/418328467)
- Category: Education, Utilities
- Price: Free
- Rating: 2.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 5 MB
- Languages: American English
- Released: 2013-04-24
- Data updated: 2026-08-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ispex/id584360175/reviews.md

## What is iSPEX?

iSPEX is a hardware add-on for smartphones that analyzes the light that enters it in terms of its spectrum and its polarization.

## Key features

- Spectrum analysis
- Polarization analysis
- Hardware add-on integration
- Educational tool

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/ispex/id584360175/reviews.md

### 3/5 — pb carte

*2016-02-17*

Depuis la MAJ ios9, la carte ne s'affiche plus!

### 2/5 — App crashing

*2015-08-18*

When I start measurement the app crashes
I am using iPhone 5s
And iOS 8.1

## Frequently asked questions about iSPEX

### What is iSPEX used for?

iSPEX is an educational tool designed to analyze the light that enters your smartphone. It measures the light's spectrum and polarization, providing insights into its physical properties.

### Does iSPEX require any special equipment?

Yes, iSPEX requires a specific hardware add-on for smartphones to function. This add-on is essential for the app to perform its light analysis capabilities.

### What is the age rating for iSPEX?

iSPEX has an age rating of 4+, making it suitable for a wide range of users interested in learning about light.

### When was iSPEX last updated?

The latest version of iSPEX is version 5, which was last updated on January 7, 2026. This indicates ongoing development and support for the application.

### What is the user rating for iSPEX?

iSPEX currently has a rating of 2.0 stars based on 1 rating. This suggests that user reception has been mixed.

### Is iSPEX available on multiple platforms?

The provided data does not specify platform compatibility beyond being a smartphone application. Users should verify compatibility with their specific device.

### How does iSPEX help with learning?

iSPEX provides a hands-on way to explore the physics of light. By analyzing spectrum and polarization, users can gain a deeper understanding of optical phenomena.

## Version history (last 5 releases)

### 5 — 2026-01-07

Water mode: saves files and metadata locally for scientific campaigns. 
Free mode now returns a plot for calibrated devices.

### 4.4 — 2023-12-18

Fixes two annoying bugs that could lead to crashes 1) Angle could be NaN 2) Slider was sometimes 'taken over' Now you can always use the brightness slider.

### 4.3 — 2023-10-31

Back end, visibility and bug fixes

### 4.2 — 2023-10-16

Fixes a bug in pointing . UI improvements (exposure slider) and some small tweaks

### 4.1 — 2023-07-26

Added buttons for water measurements
Fixes an issue with solar azimut
Better data handling
Performance improvements
Layout improvements

## Apps similar to iSPEX

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Cambridge Spiral](https://appshunter.io/ios/app/cambridge-spiral/id1526644662) | 1.0 (11) | Free | Education |
| [ESRA 2025](https://appshunter.io/ios/app/esra-2025/id6744146296) | — | Free | Education |
| [Prepsoil](https://appshunter.io/ios/app/prepsoil/id6480288814) | — | Free | Education |
| [INFINITY10X](https://appshunter.io/ios/app/infinity10x/id6747457041) | — | Free | Education |
| [MyISS](https://appshunter.io/ios/app/myiss/id6444657931) | — | Free | Education |
| [EduX](https://appshunter.io/ios/app/edux/id6444021491) | — | Free | Education |

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All apps by DDQ: https://appshunter.io/developer/418328467

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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 2026-08-16.*