Comparison

uSpectrum PAR vs Luxometer

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

Head to head
About

uSpectrum PAR

This application connects wirelessly to a handheld spectral PAR meter, allowing remote analysis and configuration of light sources. It displays detailed spectral data, light source information, and absorption metrics, with options to save and share measurements.

Highlights
  • Wireless Bluetooth connection
  • Remote light source analysis
  • Save captured data
  • Display spectrum and CIE diagrams
  • View light source metrics (LUX, CCT, CRI)
  • Share measured data via email
Features
Read full description

uSpectrum PAR is a wireless controller application for UPRtek handheld Spectral PAR Meter which provides 6 main features, namely Basic, Spectrum, PPFD Spectrum, CIE1931, CIE1976, and, CRI. Supported Devices ・PG200N (≧ FW Ver.1.1.0.B25) # uSpectrum PAR will continuously add more supported devices in the future. Connect to Handheld Spectral PAR Meter via Bluetooth ・To remotely analyze light source target. ・To remotely configure the "Integration Mode" of device ・To save the captured data of device. More Features ・To show Spectrum, PPFD Spectrum, CIE1931, CIE1976, CRI diagram of the data(*.xls), which was generated from UPRTek handheld spectral PAR meter. ・To see more information of light source, such as LUX, CCT, CRI, x, y, λp, and λpV. ・To see more information of absorption of light source, such as PPFD, PFD, PFD-R, PFD-G, and, PFD-B. ・To share the measured data via email.

About

Luxometer

Measure ambient light intensity in Lumens and color temperature in Kelvin using your phone's built-in sensors. Point your device at a light source and see real-time readings, enhanced with augmented reality visualizations.

Highlights
  • Ambient light intensity measurement (Lumens)
  • Ambient color temperature measurement (Kelvin)
  • Real-time data readouts
  • Augmented reality visualizations
  • Uses device's built-in hardware
Features
Read full description

This app functions as a light detector right from the convenience of your phone! As the old saying goes, the best light detector is the one you have on you. Well now, you can have one on you for all your safety and light detection needs with the tap of a finger. App uses the built in hardware and light detection algorithms provided by the device to offer powerful ambient light intensity detection (in Lumens) as well as ambient color temperature(in Kelvin) measurements. Simply point device in direction of light source, toggle the Light Estimation switch, and see the real time read outs of the incoming data. As a nice visual, the app also integrates some of the latest advances in Augment Reality to render floating spheres that reflect the light qualities being detected by the app.

Screenshots

uSpectrum PAR4 screens
Luxometer3 screens

Verdict

The call

The clearest difference is rating: Luxometer at 4.0 against uSpectrum PAR's 1.0. Luxometer also leads on update cadence (daily vs every 8 months) and ratings volume (8 vs 2). uSpectrum PAR's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Luxometer holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 8 respectively.

UpkeepUpdate frequency

uSpectrum PAR ships an update every 8 months, Luxometer daily. The most recent releases landed on September 16, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 6 level
uSpectrum PAR versus Luxometer: the parameters behind the verdict, then further details
ParameteruSpectrum PARLuxometer
PriceFreeFree
Rating1.0 (2 ratings)4.0 (8 ratings) — better
Positive reviews—60.0% of reviews
Number of ratings28 — better
Update frequencyEvery 8 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size25 MB0 MB
Age rating4+4+
DeveloperUnited Power Research Technology CorporationArias Software LLC

Customer experience

uSpectrum PAR

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Luxometer

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

None

uSpectrum PAR

No in-app purchases

None

Luxometer

No in-app purchases

Questions

Is uSpectrum PAR free?
uSpectrum PAR is free to download, with no in-app purchases.
Is Luxometer free?
Luxometer is free to download, with no in-app purchases.
Which has better reviews, uSpectrum PAR or Luxometer?
Luxometer is rated higher. uSpectrum PAR averages 1.0 out of 5 from 2 ratings, while Luxometer averages 4.0 from 8 ratings.
Do uSpectrum PAR or Luxometer have ads?
Neither uSpectrum PAR nor Luxometer shows ads.
Which is updated more often, uSpectrum PAR or Luxometer?
uSpectrum PAR ships an update every 8 months, and Luxometer daily. Most recently, uSpectrum PAR was updated on September 16, 2026 and Luxometer on October 3, 2026.

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