Comparison

Polytropic Pro vs Light Meter Pro

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Polytropic Pro

Features
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More than just an ordinary heat pump management tool, PolyConnect communicates directly with the POLYTROPIC Technicenter and allows the secure remote management of heat pumps: supervision, preventive maintenance, and ease of maintenance. SIMPLIFIED IMPLEMENTATION A WiFi box is installed as standard inside all our Inverter PACs (marketed from 2022), and easily accessible. From 2023 an option 4G is available. When user connect his machine and allow the professional to access to it, professional can access remotely to the machine. REMOTE MANAGEMENT A real preventive maintenance tool, the information is transmitted to allowed professional which can then anticipate any problems remotely, access the parameters and adjust, optimize, or even update the heat pump. The Modbus connection allows access to all the heat pump parameters and modification in "direct mode". PROACTIVITY Thanks to the feedback of error codes, the professional can remotely trigger an appropriate after-sales service procedure immediately, even before the user of the pool notices a possible problem or its consequences. EXPERT TIPS The TechniCenter is at your disposal for advice on the rational management of your pool fleet and possible energy savings . EFFICIENCY PolyConnect is linked to the POLYTROPIC TechniCenter and allows our technicians to visualize the entire fleet of heat pumps as well as the status of each machine. In the event of an error code, they can access the device settings via their secure interface to resolve the fault. No need to send a technician to the installation to see what the problem is, to collect simple information or to adjust the devices. POLYCONNECT IS A SECURE, FREE AND ERGONOMIC APPLICATION. It allows remote control of the heat pump via a smartphone or tablet thanks to an intuitive interface: status of the machine, water temperatures, outside temperature, operation of the filtration pump, heating setpoint temperature, choice of operating mode, alerts... In order to ensure a complete follow-up, all the data of the heat pumps connected to PolyConnect are stored for 5 years: β€’ the history of all alarms β€’ internal sensor temperature probes β€’ the operating time of compressors, pumps, etc. β€’ user settings PolyConnect was developed by our internal services and all our servers are based in France (GDPR law respected).

About

Light Meter Pro

Features
Read full description

Light Meter Pro turns your iPhone or iPad camera into an everyday light reference tool. Measure light levels on desks, reading pages, screen environments, as well as photography exposure and plant grow lights. The app estimates Lux, Color Temperature, EV100, PPFD, and DLI, offering clear adjustment suggestions tailored to your current scenario. Key Features: - Study & Reading Light Check: Evaluates lighting conditions for desks, books, and screen environments. - Photography Exposure Reference: Supports shutter speed, ISO, aperture, EV100, and suggested parameters. - Plant Lighting Estimation: Covers canopy illuminance, PPFD, DLI, and daily light hours. - Dual Measurement Modes: Supports both front-facing incident light and rear-facing reflected light measurement. - Custom Calibration: Allows you to adjust metering coefficients by comparing readings with a professional lux meter. - 100% Privacy-Focused: All processing is done locally on your device. No accounts required, no cloud uploads, and photos are never saved. Ideal Use Cases: - Checking ambient light to ensure a healthy environment for children’s homework, reading, or screen time. - Quickly referencing exposure parameters and EV differences before a photoshoot. - Determining if indoor plants need supplementary grow lights or a change of location. - Comparing lighting changes across different lamps, locations, and times of day. Important Disclaimer: Smartphone cameras are not metrologically certified lux meters, color temperature meters, spectrometers, PAR sensors, or professional photographic light meters. Light Meter Pro is designed for quick comparisons, home lighting adjustments, and pre-shoot estimates. For lighting compliance inspections, medical assessments, commercial testing, or precision agriculture, please use calibrated professional instruments.

Screenshots

Polytropic Pro4 screens
Light Meter Pro4 screens

Verdict

The call

The clearest difference is price: Polytropic Pro at Free against Light Meter Pro's $2.99. Polytropic Pro also leads on iOS requirement (14.2 vs 17.0). Light Meter Pro's advantage is update cadence (every 3 weeks vs every 3 months). On ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Polytropic Pro is free to download; Light Meter Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Polytropic Pro ships an update every 3 months, Light Meter Pro every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
Polytropic Pro versus Light Meter Pro: the parameters behind the verdict, then further details
ParameterPolytropic ProLight Meter Pro
PriceFree β€” better$2.99
Update frequencyEvery 3 monthsEvery 3 weeks β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS14.2 β€” better17.0
Further details β€” not scored
Size251 MB16 MB
Age rating4+4+
DeveloperPolytropicGuangzhou Ciyou Network Technology Co., Ltd.

In-app purchases

None

Polytropic Pro

No in-app purchases

None

Light Meter Pro

No in-app purchases

Questions

Is Polytropic Pro free?
Polytropic Pro is free to download, with no in-app purchases.
Is Light Meter Pro free?
Light Meter Pro costs $2.99, with no in-app purchases.
Do Polytropic Pro or Light Meter Pro have ads?
Neither Polytropic Pro nor Light Meter Pro shows ads.
Which is updated more often, Polytropic Pro or Light Meter Pro?
Polytropic Pro ships an update every 3 months, and Light Meter Pro every 3 weeks. Most recently, Polytropic Pro was updated on November 3, 2026 and Light Meter Pro on October 31, 2026.

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