Comparison

LightSpectrum Pro vs OSpectrometer

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

OSpectrometer

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
Read full description

Optical spectroscopy in the visible light spectrum is a commonly used tool in different fields such as health, manufacturing, art, and forensic research. OSpectrometer implements basic spectrometer functions using the built-in camera and screen without requiring external devices or programs. - Visible light spectrum is transformed and mapped to a function that generates RGB (Red Green Blue) color values - A specific light wavelength can be selected and used to illuminate a desired target (i.e., close to the screen) - The whole spectrum or a specific part of the spectrum can be selected and scanned - Front camera is used to sense the reflection from the target object - Consistent and repeatable reflection/absorption amplitude with respect to the color spectrum - The result can be saved and shared - Works offline, no need to connect to any network or internet Privacy-policy: https://software.nanorescenter.com/osprectrometer-privacy-policy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

LightSpectrum Pro4 screens
OSpectrometer4 screens

Verdict

The call

The clearest difference is price: OSpectrometer at Free against LightSpectrum Pro's $1.99. OSpectrometer also leads on update cadence (every 2 weeks vs every 3 months). LightSpectrum Pro's advantage is rating (4.1 vs 2.0) and in-app purchases (none vs 2). On ads, device support and iOS requirement 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

OSpectrometer is free to download; LightSpectrum Pro costs $1.99 up front. OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. LightSpectrum Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

LightSpectrum Pro holds the better App Store score, 4.1 against 2.0. That said, the two scores are not equally well evidenced: LightSpectrum Pro has 39 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 28% of LightSpectrum Pro's written reviews are positive against 0% of OSpectrometer's.

UpkeepUpdate frequency

LightSpectrum Pro ships an update every 3 months, OSpectrometer every 2 weeks. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

Scorecard8 real differences · 3 level
LightSpectrum Pro versus OSpectrometer: the parameters behind the verdict, then further details
ParameterLightSpectrum ProOSpectrometer
Price$1.99Free — better
Rating4.1 (39 ratings) — better2.0 (4 ratings)
Positive reviews28.5% of reviews — better0.0% of reviews
Number of ratings39 — better4
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#198 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size88 MB71 MB
Age rating4+4+
DeveloperAM PowerSoftwareNANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI

Customer experience

LightSpectrum Pro

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

OSpectrometer

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

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

OSpectrometer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

LightSpectrum Pro

No in-app purchases

2 purchases

OSpectrometer

Subscriptions2
  • month3 Days trial$2.991 Month
  • year3 Days trial$9.991 Year

Questions

Is LightSpectrum Pro free?
LightSpectrum Pro costs $1.99, with no in-app purchases.
Is OSpectrometer free?
OSpectrometer is free to download, with in-app purchases available.
Which has better reviews, LightSpectrum Pro or OSpectrometer?
LightSpectrum Pro is rated higher. LightSpectrum Pro averages 4.1 out of 5 from 39 ratings, while OSpectrometer averages 2.0 from 4 ratings.
Do LightSpectrum Pro or OSpectrometer have ads?
Neither LightSpectrum Pro nor OSpectrometer shows ads.
Which is updated more often, LightSpectrum Pro or OSpectrometer?
LightSpectrum Pro ships an update every 3 months, and OSpectrometer every 2 weeks. Most recently, LightSpectrum Pro was updated on September 22, 2026 and OSpectrometer on September 10, 2026.

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