GrowPAR vs LUX METER
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GrowPAR
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GrowPAR turns your iPhone into a professional-grade PAR light meter for indoor growing, hydroponics, and plant research. What is PAR? Photosynthetically Active Radiation (PAR) measures the light your plants actually use for photosynthesis — between 400–700nm. Unlike lux meters, GrowPAR measures what matters most to your plants. KEY MEASUREMENTS - PPFD (μmol/m²/s) — Instant photon flux density - DLI (mol/m²/day) — Daily Light Integral for growth optimization - CCT (Kelvin) — Color temperature of your light source - Lux — Illuminance measurement PLANT INTELLIGENCE GrowPAR includes a database of 36+ plants with scientifically accurate targets: - Stage-based PPFD targets: Seedling → Vegetative → Flowering → Harvest - Ideal temperature (day/night), humidity, and CO₂ levels - Hydroponics parameters: pH range and EC values - LED distance and photoperiod recommendations - Real-time sufficiency indicator: Is your light enough? LIGHT SOURCES Calibrated for all grow light types: - Full Spectrum LED • Red/Blue LED • HPS • CMH • Natural Sunlight MEASUREMENTS & HISTORY - Save unlimited measurements with timestamp - Filter by plant and light source - Export to CSV for analysis CALIBRATION Use with Apogee MQ-500 or similar quantum sensor for research-grade accuracy. 11 LANGUAGES English · German · Spanish · Turkish · French · Italian · Portuguese · Russian · Japanese · Chinese · Arabic Whether you're growing tomatoes, microgreens, or orchids — GrowPAR gives you the data to grow smarter. Privacy Policy: https://hfozturka.github.io/growpar/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
LUX METER
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Lux and PPFD Meter Pro turns your mobile device into a professional-grade light measurement tool, designed specifically for indoor growers, plant enthusiasts, and gardeners. Measure and track the exact light levels your plants need for optimal growth using scientific metrics. Key Features: Precise Lux and PPFD Measurement Get accurate, real-time measurements of Lux and Photosynthetic Photon Flux Density (PPFD) using your device's camera. Fine-tune your readings with advanced calibration tools to match professional reference light meters. DLI (Daily Light Integral) Calculator Calculate the cumulative daily light integral (DLI) received by your plants. Track whether your plants are meeting their light requirements based on the light source type and daily exposure duration (photoperiod). Smart Plant Growth Guides Access recommended DLI and PPFD target ranges for various growth stages, including seedlings, vegetative, flowering, microgreens, and leafy greens. Tailor your setups to meet these targets. Live AR Light Distribution Mapping Use augmented reality (AR) technology to pin and measure light intensity at different spots in your grow room or house. Visualize the 3D distribution of light overlaid on the live camera view. AI Plant Doctor and Guidance Get instant visual analysis of your plant setup to diagnose light sufficiency. Receive tailored guidance on plant placement and light adjustments to prevent light burn or stretching. Daylight Mapper and Location Assistant Log measurements throughout the day (morning, noon, and evening) to scientifically map the light patterns in your home. Find the absolute best location for any plant type. History Log and CSV Data Export Save your measurement sessions and review detailed analytics, charts, and statistics (minimum, maximum, and average values). Export your logged data in CSV format for sharing or external analysis. Privacy and Security: This app requires camera permission solely for calculating light intensity and rendering AR features. No photos, videos, or camera feeds are ever recorded, saved, or shared with third parties. Take the guesswork out of plant care. Manage your growing process scientifically with Lux and PPFD Meter Pro. Pro Lifetime Access: A one-time purchase that unlocks all professional features permanently. No recurring charges. Support, Privacy, and Terms of Use: Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://doc-hosting.flycricket.io/lux-metre-lux-fc-ppfd/1a214033-86af-4837-8110-a81c23dd54ff/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: GrowPAR at none against LUX METER's 1. LUX METER's advantage is iOS requirement (15.6 vs 17.0). On price, 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
Both are free to download. LUX METER sells 1 one-off in-app purchase. GrowPAR asks for nothing beyond the download.
| Parameter | GrowPAR | LUX METER |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 11 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Halil Fatih Ozturk | Emirhan Salihoglu |
In-app purchases
GrowPAR
No in-app purchases
LUX METER
- Premium Lifetime$2.99







