# OSpectrometer vs Light Spectrometer Wavelength

The clearest difference is review sentiment: Light Spectrometer Wavelength at 72% against OSpectrometer's 0%. Light Spectrometer Wavelength also leads on rating (4.2 vs 2.0) and ratings volume (92 vs 4). OSpectrometer's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. OSpectrometer sells 2 in-app purchases, starting at $2.99 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.

Light Spectrometer Wavelength holds the better App Store score, 4.2 against 2.0. That said, the two scores are not equally well evidenced: Light Spectrometer Wavelength has 92 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of OSpectrometer's written reviews are positive against 72% of Light Spectrometer Wavelength's.

OSpectrometer ships an update every 2 weeks, Light Spectrometer Wavelength every 2 months. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | OSpectrometer | Light Spectrometer Wavelength |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/ospectrometer/id6446124449/reviews) | **[4.2 (92 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews)** |
| Number of ratings | 4 | **92** |
| Positive reviews | 0.0% of reviews | **71.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 71 MB | 43 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### 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 |


### 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 OSpectrometer free?

OSpectrometer 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, OSpectrometer or Light Spectrometer Wavelength?

Light Spectrometer Wavelength is rated higher. OSpectrometer averages 2.0 out of 5 from 4 ratings, while Light Spectrometer Wavelength averages 4.2 from 92 ratings.

### Do OSpectrometer or Light Spectrometer Wavelength have ads?

Neither OSpectrometer nor Light Spectrometer Wavelength shows ads.

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

OSpectrometer ships an update every 2 weeks, and Light Spectrometer Wavelength every 2 months. Most recently, OSpectrometer was updated on September 10, 2026 and Light Spectrometer Wavelength on September 22, 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.*