Comparison

uSpectrum PAR vs OSpectrometer

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

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

uSpectrum PAR4 screens
OSpectrometer4 screens

Verdict

The call

The clearest difference is rating: OSpectrometer at 2.0 against uSpectrum PAR's 1.0. OSpectrometer also leads on update cadence (every 2 weeks vs every 8 months). uSpectrum PAR's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 15.1). On price, ratings volume, ads and device support 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. OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. uSpectrum PAR asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OSpectrometer holds the better App Store score, 2.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

UpkeepUpdate frequency

uSpectrum PAR ships an update every 8 months, OSpectrometer every 2 weeks. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 5 level
uSpectrum PAR versus OSpectrometer: the parameters behind the verdict, then further details
ParameteruSpectrum PAROSpectrometer
PriceFreeFree
Rating1.0 (2 ratings)2.0 (4 ratings) — better
Positive reviews0.0% of reviews
Number of ratings24 — better
Update frequencyEvery 8 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.1
Further details — not scored
Size25 MB71 MB
Age rating4+4+
DeveloperUnited Power Research Technology CorporationNANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI

Customer experience

uSpectrum PAR

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

OSpectrometer

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

In-app purchases

None

uSpectrum PAR

No in-app purchases

2 purchases

OSpectrometer

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

Questions

Is uSpectrum PAR free?
uSpectrum PAR is free to download, with no in-app purchases.
Is OSpectrometer free?
OSpectrometer is free to download, with in-app purchases available.
Which has better reviews, uSpectrum PAR or OSpectrometer?
OSpectrometer is rated higher. uSpectrum PAR averages 1.0 out of 5 from 2 ratings, while OSpectrometer averages 2.0 from 4 ratings.
Do uSpectrum PAR or OSpectrometer have ads?
Neither uSpectrum PAR nor OSpectrometer shows ads.
Which is updated more often, uSpectrum PAR or OSpectrometer?
uSpectrum PAR ships an update every 8 months, and OSpectrometer every 2 weeks. Most recently, uSpectrum PAR was updated on September 16, 2026 and OSpectrometer on September 10, 2026.

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