Comparison

LightSpectrum Pro vs Light Spectrometer Wavelength

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

LightSpectrum Pro

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
Currently charting
Read full description

With LightSpectrumPro EVO you can measure the color temperature of a light source without having to spend hundreds of dollars on professional devices. LightSpectrumPro EVO has an error of 2 - 8% compared to existing professional products on the market. in addition to the color temperature measurement in Kelvin, LightSpectrumPro EVO allows you to view the color spectrum of the light being examined with a band ranging from 360nm to 800nm. in addition to the spectrum it is possible to display the position of the white point on the CIE 1931 diagram and to apply a filter for wavelengths to display in overlay on the image captured by the cameras which elements reflect a specific frequency and with what intensity.

About

Light Spectrometer Wavelength

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
Read full description

Measures light spectrum to determine the dominant wavelength in nm, frequency in THz and period length in fs. DOMINANT WAVELENGTH Dominant wavelength is a concept commonly used in the field of color science and perception. It refers to the wavelength of light that appears most prominent or dominant in a given color mixture or light source. In other words, it is the wavelength that our eyes perceive as the primary color in a mixture of different wavelengths. For light with only one wavelength, such as the light from a colored LED, the dominant wavelength corresponds to the wavelength of that light. KEY FEATURES • High accuracy • Real-time measurement • Measures light wavelength in nanometers (nm) • Measures light frequency in terahertz (Thz) • Measures light period length in femtoseconds (fs) • Easy to use • Save measurements with notes • Supports 40 languages, including english • Optional calibration for enhanced precision MEASURING 1. Find a white surface, such as a plain piece of white paper 2. Point your camera at the surface illuminated by your target light source 3. The app gives you accurate measurements in real-time LIMITATIONS Smartphone cameras have limitations when it comes to distinguishing between different very short, or very long wavelengths. More specifically, on many devices the accuracy below 465 nm and above 610 nm is very limited. This is due to the physical camera sensors in the devices. An automatic warning appears on the screen for these short and long wavelengths. WHITE LIGHT Note that is not meaningful to measure the dominant wavelength of white light as white light consists of a wide range of wavelengths, with no wavelength dominating. This app is made for measuring colored light. If you are interested in determining the color temperature of white light, please instead use our popular White Balance Kelvin Meter app. COLOR OF SURFACES If you want to measure the color of a surface or material, rather than of light, please instead use our popular Colorimeter Camera Color Meter app. Privacy Policy, https://spectrometer.contechity.com/pp.html End User License Agreement, https://spectrometer.contechity.com/eula.html CONTACT I value your feedback. Email me at apps@contechity.com with any suggestions or questions. Download the Spectrometer now!

Screenshots

LightSpectrum Pro4 screens
Light Spectrometer Wavelength4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 6 level
LightSpectrum Pro versus Light Spectrometer Wavelength: the parameters behind the verdict, then further details
ParameterLightSpectrum ProLight Spectrometer Wavelength
Price$1.99Free — better
Rating4.1 (39 ratings)4.2 (92 ratings) — better
Positive reviews28.5% of reviews71.9% of reviews — better
Number of ratings3992 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#183 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size88 MB43 MB
Age rating4+4+
DeveloperAM PowerSoftwareContechity AB

Customer experience

LightSpectrum Pro

All ratings39 ratings
Positive76.9%
Neutral2.6%
Negative20.5%
Written reviews172 reviews
Positive28.5%
Neutral5.8%
Negative65.7%

Light Spectrometer Wavelength

All ratings92 ratings
Positive80.4%
Neutral3.3%
Negative16.3%
Written reviews32 reviews
Positive71.9%
Neutral3.1%
Negative25.0%

Bugs and requests

LightSpectrum Pro

Reported bugs

11 issues
  • 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
Show 6 more
  • App freezes and cannot be exited
  • Black screen on launch
  • Inconsistent readings that change rapidly
  • App stuck on opening screen
  • Camera focus issues on iPhone X and newer models
  • Incompatibility with iOS 5, 6, and newer iPhone models

Requested features

11 requests
  • 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
Show 6 more
  • Tap-to-focus camera control
  • Landscape orientation support
  • Ability to disable tutorial tips
  • Screenshot capability in landscape mode
  • Better documentation and user guide
  • Device compatibility information in app store listing

Light Spectrometer Wavelength

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

LightSpectrum Pro

No in-app purchases

4 purchases

Light Spectrometer Wavelength

Subscriptions3
  • Full Access7 Days trial$0.991 Month
  • Full access14 Days trial$0.991 Month
  • Full access$4.991 Year
One-time1
  • Full access4 variants$6.99

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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