# uSpectrum PAR vs LuxSeeker

The clearest difference is rating: LuxSeeker at 3.0 against uSpectrum PAR's 1.0. LuxSeeker also leads on update cadence (every 3 months vs every 8 months). uSpectrum PAR's advantage is iOS requirement (9.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

LuxSeeker holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

uSpectrum PAR ships an update every 8 months, LuxSeeker every 3 months. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | uSpectrum PAR | LuxSeeker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/uspectrum-par/id1466017397/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/luxseeker-ble-lightmeter/id1498091398/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 25 MB | 58 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [LIDlight INC.](https://appshunter.io/developer/1498091397) |

## What reviewers say

### uSpectrum PAR

[App page](https://appshunter.io/ios/app/uspectrum-par/id1466017397)

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:** macOS Compatibility

**In-app purchases:** none


### LuxSeeker

[App page](https://appshunter.io/ios/app/luxseeker-ble-lightmeter/id1498091398)

Measure illuminance and color temperature in real-time. Get lighting scene recommendations based on EML, lux, and CCT values. Snapshot data and share trends via CSV or PNG.

**Highlights:** Real-time illuminance (lux) measurement, Real-time color temperature (CCT) measurement, Lighting scene recommendations (EML, lux, CCT), Snapshot and share data via CSV, Trend charts shareable via PNG

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is uSpectrum PAR free?

uSpectrum PAR is free to download, with no in-app purchases.

### Is LuxSeeker free?

LuxSeeker is free to download, with no in-app purchases.

### Which has better reviews, uSpectrum PAR or LuxSeeker?

LuxSeeker is rated higher. uSpectrum PAR averages 1.0 out of 5 from 3 ratings, while LuxSeeker averages 3.0 from 2 ratings.

### Do uSpectrum PAR or LuxSeeker have ads?

Neither uSpectrum PAR nor LuxSeeker shows ads.

### Which is updated more often, uSpectrum PAR or LuxSeeker?

uSpectrum PAR ships an update every 8 months, and LuxSeeker every 3 months. Most recently, uSpectrum PAR was updated on October 21, 2026 and LuxSeeker on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*