Comparison

LightMeter Pro vs GrowPAR

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

Head to head
About

LightMeter Pro

Features
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LightMeter Pro turns your iPhone into a professional light meter — for photographers, filmmakers, and plant growers alike. PRECISE LIGHT MEASUREMENT - Real-time Lux, Foot-candle, and EV readings from your camera sensor - Color temperature in Kelvin with visual warm/cool bar - Continuous metering with smooth, responsive updates FULL MANUAL CONTROL - Set ISO, shutter speed, and aperture manually — just like a Sekonic or Gossen - Lock any parameter and let the others auto-adjust - Standard photography stops for all three values - Tap to switch between front and rear camera PLANT & GROW LIGHT MODE - Switch to Plant mode for PPFD readings (µmol/m²/s) - DLI (Daily Light Integral) calculator for optimal plant growth - Light source presets: LED, HPS, Fluorescent, Sunlight - Adjustable photoperiod (4-24h) for accurate DLI AI SCENE ANALYSIS - Point your camera at any scene and get instant lighting analysis - AI identifies scene type, lighting quality, and mood - Actionable recommendations to improve your setup - 10 scenario presets: Portrait, Product, Interview, Cinematic, and more DESIGNED FOR PROFESSIONALS - Live camera viewfinder with overlay controls - Premium dark interface — built for on-set use - Haptic feedback on every interaction - No ads. No clutter. Just precision. SUBSCRIPTION - 3 free AI scans per day - Pro unlocks unlimited AI analysis, manual shutter & aperture control - Weekly, annual, and lifetime plans available Perfect for photographers, DPs, gaffers, content creators, interior designers, plant parents, and anyone who works with light. AI & DATA PRIVACY AI Scene Analysis uses Anthropic's Claude technology. When you use this feature, your photo is sent securely to Anthropic's servers for processing. Images are not stored after analysis. No personal data is collected or shared. See our privacy policy for details. Privacy Policy: https://www.easytech-agency.net/privacy/lightmeter_pro Terms of Use: https://www.easytech-agency.net/terms

About

GrowPAR

Features
Read full description

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/

Screenshots

LightMeter Pro4 screens
GrowPAR4 screens

Verdict

The call

LightMeter Pro and GrowPAR are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. LightMeter Pro sells 3 in-app purchases, starting at $2.99 per 7 days and GrowPAR sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
LightMeter Pro versus GrowPAR: the parameters behind the verdict, then further details
ParameterLightMeter ProGrowPAR
PriceFreeFree
Update frequency—Every 5 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size11 MB11 MB
Age rating4+4+
DeveloperAlexis RaimbaultHalil Fatih Ozturk

In-app purchases

3 purchases

LightMeter Pro

Subscriptions3
  • LightMeter Pro Weekly$2.997 Days
  • LightMeter Pro Monthly$5.991 Month
  • LightMeter Pro Yearly$24.991 Year
2 purchases

GrowPAR

Subscriptions2
  • com.hfozturka.growparios.monthly$2.991 Month
  • com.hfozturka.growparios.yearly$9.991 Year

Questions

Is LightMeter Pro free?
LightMeter Pro is free to download, with in-app purchases available.
Is GrowPAR free?
GrowPAR is free to download, with in-app purchases available.
Do LightMeter Pro or GrowPAR have ads?
Neither LightMeter Pro nor GrowPAR shows ads.

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