# Colorimeter App vs Light Spectrometer Wavelength

The clearest difference is ads: Light Spectrometer Wavelength at none against Colorimeter App's shown. Colorimeter App's advantage is rating (4.7 vs 4.2) and update cadence (every 3 weeks vs every 2 months). On price, review sentiment, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Colorimeter App sells 2 in-app purchases, starting at $0.49 per month and Light Spectrometer Wavelength sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Colorimeter App holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 137 and 92 respectively. Written reviews complicate that: 64% of Colorimeter App's written reviews are positive against 72% of Light Spectrometer Wavelength's, so the app with the better star average is not the one people write more warmly about.

Colorimeter App ships an update every 3 weeks, Light Spectrometer Wavelength every 2 months. The most recent releases landed on September 20, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Colorimeter App | Light Spectrometer Wavelength |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (137 ratings)](https://appshunter.io/ios/app/colorimeter-app/id1542365656/reviews)** | [4.2 (92 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews) |
| Number of ratings | **137** | 92 |
| Positive reviews | 64.3% of reviews | **71.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 37 MB | 43 MB |
| Requires iOS | **14.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Serhii Smyk](https://appshunter.io/developer/980088183) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### Colorimeter App

[App page](https://appshunter.io/ios/app/colorimeter-app/id1542365656)

Capture and analyze colors from your camera or photos. Get detailed information, convert between various color formats, and access extensive color lists. Includes tools for color mixing, difference calculation, and even color blindness tests.

**Highlights:** Pick color from camera, Pick color from photos, Color conversion, Color mixer, Color difference calculation, CSS and RAL color lists, Color blindness tests

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium for 1 month | $0.49 | per month |
| Premium for 1 year | $1.99 | per year |


### Light Spectrometer Wavelength

[App page](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820)

This application analyzes light to determine its dominant wavelength in nanometers, frequency in terahertz, and period length in femtoseconds. It provides real-time measurements and allows users to save their findings with notes. The app is designed for measuring colored light sources.

**Highlights:** Measures dominant wavelength (nm), Measures frequency (THz), Measures period length (fs), Real-time measurement, Save measurements with notes, Optional calibration

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $0.99 | per month |
| Full access | $0.99 | per month |
| Full access | $4.99 | per year |
| Full access | $6.99 | one-time |


## Frequently asked questions

### Is Colorimeter App free?

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

### Is Light Spectrometer Wavelength free?

Light Spectrometer Wavelength is free to download, with in-app purchases available.

### Which has better reviews, Colorimeter App or Light Spectrometer Wavelength?

Colorimeter App is rated higher. Colorimeter App averages 4.7 out of 5 from 137 ratings, while Light Spectrometer Wavelength averages 4.2 from 92 ratings.

### Do Colorimeter App or Light Spectrometer Wavelength have ads?

Colorimeter App shows ads; Light Spectrometer Wavelength does not.

### Which is updated more often, Colorimeter App or Light Spectrometer Wavelength?

Colorimeter App ships an update every 3 weeks, and Light Spectrometer Wavelength every 2 months. Most recently, Colorimeter App was updated on September 20, 2026 and Light Spectrometer Wavelength on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*