# LightSpectrum Pro vs Light Spectrometer Wavelength

The clearest difference is price: Light Spectrometer Wavelength at Free against LightSpectrum Pro's $1.99. Light Spectrometer Wavelength also leads on review sentiment (72% vs 28%). LightSpectrum Pro's advantage is in-app purchases (none vs 7) and chart position (#183 vs unranked). On rating, ratings volume, update cadence and ads there is nothing between them.

Light Spectrometer Wavelength is free to download; LightSpectrum Pro costs $1.99 up front. Light Spectrometer Wavelength sells 4 in-app purchases, starting at $0.99 per month. LightSpectrum Pro asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.1 for LightSpectrum Pro against 4.2 for Light Spectrometer Wavelength. Both are backed by a comparable volume of ratings — 39 and 92 respectively. Written reviews are what separate them: 28% of LightSpectrum Pro's written reviews are positive against 72% of Light Spectrometer Wavelength's.

LightSpectrum Pro ships an update every 3 months, Light Spectrometer Wavelength every 2 months. Both last shipped on September 22, 2026.

## The numbers

| Metric | LightSpectrum Pro | Light Spectrometer Wavelength |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.1 (39 ratings)](https://appshunter.io/ios/app/lightspectrum-pro/id468368751/reviews) | **[4.2 (92 ratings)](https://appshunter.io/ios/app/light-spectrometer-wavelength/id6450930820/reviews)** |
| Number of ratings | 39 | **92** |
| Positive reviews | 28.5% of reviews | **71.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#183** | — |
| Size | 88 MB | 43 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AM PowerSoftware](https://appshunter.io/developer/303958914) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### LightSpectrum Pro

[App page](https://appshunter.io/ios/app/lightspectrum-pro/id468368751)

**Currently charting:** #183 Top Paid · Utilities (US App Store)

Measure light source color temperature and spectrum accurately without expensive equipment. View the color spectrum from 360nm to 800nm, and analyze the white point on the CIE 1931 diagram. Overlay filtered wavelengths on camera images to see frequency reflections and intensity.

**Highlights:** Color temperature measurement, Color spectrum analysis (360nm-800nm), CIE 1931 white point display, Wavelength filtering and overlay, High accuracy compared to professional devices

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 📸 Accurate white balance measurement for photography
- 💡 Innovative spectrum analysis without expensive equipment
- 💰 Affordable alternative to $1,600+ professional color meters
- 📊 Detailed spectral graph visualization
- 🎯 Useful for photographers, videographers, and lighting professionals

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 📱 Incompatible with many iPhone models (iPhone 5, 5S, 6, 6+, 11, X)
- ❌ Camera access problems on multiple devices
- 🎨 Inaccurate readings for certain light types (LEDs, low color temps)
- 🖥️ Poor UI scaling on larger screens (iPhone 6+, iPad)

**Reported bugs**

- App crashes on startup or during use
- Camera feed not accessible or showing red X icon
- Screen blinking/flashing on first launch
- UI elements cut off on larger screens
- Buttons unresponsive or sticky

**Requested features**

- Spot metering with crosshairs or target reticle
- Direct DUV (Delta uv) display calculation
- Flicker detection for light sources
- Calibration function for improved accuracy
- Support for fluorescent light preset adjustments


### 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 LightSpectrum Pro free?

LightSpectrum Pro costs $1.99, with no in-app purchases.

### Is Light Spectrometer Wavelength free?

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

### Which has better reviews, LightSpectrum Pro or Light Spectrometer Wavelength?

Light Spectrometer Wavelength is rated higher. LightSpectrum Pro averages 4.1 out of 5 from 39 ratings, while Light Spectrometer Wavelength averages 4.2 from 92 ratings.

### Do LightSpectrum Pro or Light Spectrometer Wavelength have ads?

Neither LightSpectrum Pro nor Light Spectrometer Wavelength shows ads.

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

LightSpectrum Pro ships an update every 3 months, and Light Spectrometer Wavelength every 2 months. Most recently, LightSpectrum Pro was updated on September 22, 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.*