# Colorimeter App vs OSpectrometer

The clearest difference is review sentiment: Colorimeter App at 64% against OSpectrometer's 0%. Colorimeter App also leads on rating (4.7 vs 2.0) and ratings volume (137 vs 4). OSpectrometer's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Colorimeter App sells 2 in-app purchases, starting at $0.49 per month and OSpectrometer sells 2 in-app purchases, starting at $2.99 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 2.0. That said, the two scores are not equally well evidenced: Colorimeter App has 137 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 64% of Colorimeter App's written reviews are positive against 0% of OSpectrometer's.

Colorimeter App ships an update every 3 weeks, OSpectrometer every 2 weeks. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Colorimeter App | OSpectrometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (137 ratings)](https://appshunter.io/ios/app/colorimeter-app/id1542365656/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/ospectrometer/id6446124449/reviews) |
| Number of ratings | **137** | 4 |
| Positive reviews | **64.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 37 MB | 71 MB |
| Requires iOS | **14.1** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Serhii Smyk](https://appshunter.io/developer/980088183) | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) |

## 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 |


### OSpectrometer

[App page](https://appshunter.io/ios/app/ospectrometer/id6446124449)

This app uses your device's camera and screen to perform basic optical spectroscopy. Analyze the visible light spectrum of objects, map light wavelengths to RGB values, and save or share your findings. It functions offline without external hardware.

**Highlights:** Visible light spectrum analysis, RGB color value mapping, Wavelength selection and scanning, Front camera reflection sensing, Save and share results, Offline functionality

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| month | $2.99 | per month |
| year | $9.99 | per year |


## Frequently asked questions

### Is Colorimeter App free?

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

### Is OSpectrometer free?

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

### Which has better reviews, Colorimeter App or OSpectrometer?

Colorimeter App is rated higher. Colorimeter App averages 4.7 out of 5 from 137 ratings, while OSpectrometer averages 2.0 from 4 ratings.

### Do Colorimeter App or OSpectrometer have ads?

Colorimeter App shows ads; OSpectrometer does not.

### Which is updated more often, Colorimeter App or OSpectrometer?

Colorimeter App ships an update every 3 weeks, and OSpectrometer every 2 weeks. Most recently, Colorimeter App was updated on October 12, 2026 and OSpectrometer on October 15, 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.*