# uSpectrum PAR vs Mars Legacy

The clearest difference is update cadence: Mars Legacy at monthly against uSpectrum PAR's every 8 months. Mars Legacy also leads on rating (1.3 vs 1.0) and ratings volume (71 vs 3). 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.

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

Mars Legacy holds the better App Store score, 1.3 against 1.0. That said, the two scores are not equally well evidenced: Mars Legacy has 71 ratings behind it against 3, so its average is the more settled of the two.

uSpectrum PAR ships an update every 8 months, Mars Legacy monthly. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | uSpectrum PAR | Mars Legacy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/uspectrum-par/id1466017397/reviews) | **[1.3 (71 ratings)](https://appshunter.io/ios/app/mars-legacy/id1612237275/reviews)** |
| Number of ratings | 3 | **71** |
| Positive reviews | — | 12.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | Free | Free |
| Size | 25 MB | 59 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United Power Research Technology Corporation](https://appshunter.io/developer/1501316337) | [MARS TRADING RCC, INC.](https://appshunter.io/developer/1726858942) |

## 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


### Mars Legacy

[App page](https://appshunter.io/ios/app/mars-legacy/id1612237275)

Control and configure your indoor grow lights remotely. Automate growth cycles with custom timers, simulate sunrise and sunset, and manage multiple lights independently from a single device. Compatible with the Mars Hydro Smart Grow System.

**Highlights:** Remote LED light control, Adjustable light intensity, Automatic growth cycle programming, Sunrise/sunset simulation, Wireless multi-light control, Independent lighting group management

**In-app purchases:** none

**What reviewers like**

- ✅ Fan control works reliably
- ⚙️ Basic on/off functionality operational
- 🎯 Good hardware quality (lights and fans)
- 💰 Reasonable price-to-quality ratio
- 📱 App concept is innovative

**What reviewers complain about**

- 🐛 Frequent disconnections (WiFi and Bluetooth)
- ⏱️ Timer functionality completely broken
- 🌅 Sunrise/sunset mode non-functional
- 🎬 Scene/automation features unreliable
- 🔄 App randomly resets or crashes

**Reported bugs**

- App cannot detect Bluetooth despite phone detecting it
- Timer settings do not execute at scheduled times
- Scenes and automation groups fail to work
- WiFi connection drops frequently and reconnection fails
- Light brightness changes unexpectedly without user input

**Requested features**

- Multiple on/off cycles per day for automation
- Daylight saving time adjustment option
- Sunrise/sunset mode with adjustable brightness levels
- Better WiFi stability and range
- Improved app interface and user experience


## Frequently asked questions

### Is uSpectrum PAR free?

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

### Is Mars Legacy free?

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

### Which has better reviews, uSpectrum PAR or Mars Legacy?

Mars Legacy is rated higher. uSpectrum PAR averages 1.0 out of 5 from 3 ratings, while Mars Legacy averages 1.3 from 71 ratings.

### Do uSpectrum PAR or Mars Legacy have ads?

Neither uSpectrum PAR nor Mars Legacy shows ads.

### Which is updated more often, uSpectrum PAR or Mars Legacy?

uSpectrum PAR ships an update every 8 months, and Mars Legacy monthly. Most recently, uSpectrum PAR was updated on October 21, 2026 and Mars Legacy on October 22, 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.*