uSpectrum PAR vs Luxometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Ambient light intensity measurement (Lumens)
- Ambient color temperature measurement (Kelvin)
- Real-time data readouts
- Augmented reality visualizations
- Uses device's built-in hardware
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
uSpectrum PAR ships an update every 8 months, Luxometer daily. The most recent releases landed on September 16, 2026 and October 3, 2026 respectively.
| Parameter | uSpectrum PAR | Luxometer |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) | 4.0 (8 ratings) — better |
| Positive reviews | — | 60.0% of reviews |
| Number of ratings | 2 | 8 — better |
| Update frequency | Every 8 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 25 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | United Power Research Technology Corporation | Arias Software LLC |
Customer experience
uSpectrum PAR
Luxometer
In-app purchases
uSpectrum PAR
No in-app purchases
Luxometer
No in-app purchases







