uSpectrum PAR vs Mars Legacy
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
Read full descriptionHide 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.
Mars Legacy
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.
- Remote LED light control
- Adjustable light intensity
- Automatic growth cycle programming
- Sunrise/sunset simulation
- Wireless multi-light control
- Independent lighting group management
Read full descriptionHide full description
The Mars Hydro app is launched to build a smart, simplified, frontier a ccess for growers to a more manageable grow project, supporting m obile control and growth programs configuration, compatible with Ma rs Hydro Smart Grow System at: www.mars-hydro.com *Easily turn ON/OFF your LED grow lights and adjust the intensity with j ust a few clicks. *Precisely arrange time triggers to achieve automatic growth cycles an d simulation of sunrise and sunset. *Wireless control of multiple LED grow lights via one device at the sam e time. *Different lighting groups are available for independent management, which enables simultaneous monitor on paralleled grows. ...More to be launched
Screenshots
Verdict
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.
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.
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.
| Parameter | uSpectrum PAR | Mars Legacy |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) | 1.3 (71 ratings) — better |
| Positive reviews | — | 12.2% of reviews |
| Number of ratings | 3 | 71 — better |
| Update frequency | Every 8 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 25 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | United Power Research Technology Corporation | MARS TRADING RCC, INC. |
Customer experience
uSpectrum PAR
Mars Legacy
Bugs and requests
uSpectrum PAR
Not enough reviews yet to summarise bugs or requests.
Mars Legacy
Reported bugs
20 issues- 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
Show 15 moreShow fewer
- Humidity readings display unrealistic fantasy values
- App crashes and loses all device/account data
- Login verification codes not received
- Sunrise/sunset mode ignores brightness settings and forces 100%
- Time selection interface is confusing and unreliable
- Fan disconnects from app during use
- PPFD settings reset unexpectedly
- App update broke existing functionality
- Device not detected during initial setup
- Password signup validation error
- Bluetooth icon shows as disabled after update
- Light turns off mid-cycle without reason
- Temperature unit cannot be changed to Celsius
- Scenes override manual timer settings
- App fails to save time settings correctly
Requested features
12 requests- 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
Show 7 moreShow fewer
- Comprehensive help documentation
- Account recovery and data persistence
- Multi-language support with accurate translations
- System time picker instead of custom control
- Ability to set different brightness levels for different scenes
- More reliable remote control functionality
- Better error messages and troubleshooting guidance
In-app purchases
uSpectrum PAR
No in-app purchases
Mars Legacy
No in-app purchases
