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Best Light Meter Free Plant Apps

240+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated July 2026

If you already know Photone, this is the deeper bench. 240+ light meter free plant apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Light Meter Free Plant Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Photone - Grow Light MeterPhotone - Grow Light MeterFree4.6★ (4.9K)NoYesJul 2026
2Light Meter For PlantsLight Meter For PlantsFree4.0★ (2)NoYesJul 2026
3Light Meter LM-3000Light Meter LM-3000Free4.5★ (2.5K)NoYesJul 2026
4Bask Light MeterBask Light MeterFree5.0★ (2)NoNoJul 2026
5Light Meter: Lux & PlantsLight Meter: Lux & PlantsFree—NoYesJul 2026
6Lux Light Meter for MobileLux Light Meter for MobileFree4.4★ (190)YesYesJul 2026
7Planta: Plant & Garden CarePlanta: Plant & Garden CareFree4.8★ (112K)YesYesJul 2026
8Plant Light MeterPlant Light Meter$2.994.6★ (1K)NoNoJul 2026

Top Picks for Light Meter Free Plant

Photone - Grow Light Meter#1

Photone - Grow Light Meter by Lightray Innovation GmbH

Perfectly light your plants!
Editor's Choice
🔧 Utilities
4.6😐(4.9K ratings)
FreeIn-App Purchases
Photone - Grow Light Meter screenshot 1
Photone - Grow Light Meter screenshot 2
Photone - Grow Light Meter screenshot 3
Photone - Grow Light Meter screenshot 4
Photone - Grow Light Meter screenshot 5
Photone - Grow Light Meter screenshot 6

This app acts as a professional-grade light meter for plants, measuring PAR, PPFD, DLI, and more using your device's camera. It helps optimize plant lighting by providing accurate readings and in-app guides, with optional advanced features available through purchase.

What We Love

  • 🚀 Accurate readings
  • 💡 Helpful for growing plants
  • 👍 Easy to use
  • 🚀 Saves money compared to expensive meters

Room to Improve

  • 🐛 Inconsistent readings
  • 💰 Expensive in-app purchases
  • 🔒 Requires additional equipment (diffuser) to work properly
Light Meter For Plants#2

Light Meter For Plants by Nicolas Gustavo Melian

Measure light for your plants
Strong Contender
🌟 Lifestyle
4.0(2 ratings)
FreeIn-App Purchases
Light Meter For Plants screenshot 1
Light Meter For Plants screenshot 2
Light Meter For Plants screenshot 3

Transform your phone into a precise light meter to assess the illumination in any area. Discover which plants will flourish in specific spots based on real-time lux readings and a comprehensive plant database.

Light Meter LM-3000#3

Light Meter LM-3000 by Lightray Innovation GmbH

Simple & accurate measurement!
Worth Considering
🔧 Utilities
4.5😐(2.5K ratings)
FreeIn-App Purchases
Light Meter LM-3000 screenshot 1
Light Meter LM-3000 screenshot 2
Light Meter LM-3000 screenshot 3
Light Meter LM-3000 screenshot 4

Transform your smartphone into a professional light meter. Measure illuminance and color temperature with scientifically validated accuracy, trusted by professionals. Requires a simple diffuser for precise readings.

What We Love

  • 👍 Great app
  • 👍 Accurate measurements
  • 👍 Easy to use
  • 👍 Helpful customer service

Room to Improve

  • 🐛 Requires diffuser for accurate readings
  • 💰 Expensive for a light meter app
  • 🔋 Battery/trial period issues

More Light Meter Free Plant apps to explore

4
Bask Light Meter
Bask Light Meter
Bask Light Meter
Measure light for your plants
Free

This app uses your device's camera to measure sunlight intensity. It helps you determine the best locations in your home for your houseplants to receive optimal light for growth.

Measure sunlight with cameraOptimize plant placementSupports houseplants
🌟 Lifestyle
(2)
free
5
Light Meter: Lux & Plants
Light Meter: Lux & Plants
Light Meter: Lux & Plants
Measure Ambient Brightness
Free
🔧 Utilities
(0)
6
Lux Light Meter for Mobile
Lux Light Meter for Mobile
Lux Light Meter for Mobile
Lux-Meter & Exposure Measure
Free

This app provides accurate and easy-to-use light measurements in lux and foot candles. It's ideal for photographers, plant owners, and anyone needing to assess ambient light levels in various spaces. Features include real-time color temperature measurement and calculation of the daily light integral.

Real-time color temperature measurementLux and foot candle measurementsDaily light integral (DLI) calculation
🔧 Utilities
(190)
free with in-app purchases
7
Planta: Plant & Garden Care
Planta: Plant & Garden Care
Planta: Plant & Garden Care
Happy Life, Happy Plants!
Free

Identify plants with a photo, receive personalized care schedules, and get help diagnosing plant problems. Track your plant's progress and learn from a community of plant lovers.

AI plant identificationPersonalized care schedulesPlant problem diagnosis
🌟 Lifestyle
(112K)
subscription
8
Plant Light Meter
Plant Light Meter
Plant Light Meter
For houseplants
$2.99

This app helps indoor plant owners assess the light conditions their plants are receiving. By using your phone's camera, you can measure light levels and understand if they are optimal for your specific plant's needs, preventing common issues like lack of light.

Measure natural and artificial lightInterpret light levels for plant healthCompatible with rear camera
🔧 Utilities
(1K)
free
9
PPFD METER - Grow Light Meter
PPFD METER - Grow Light Meter
PPFD METER - Grow Light Meter
LUX, PAR, PPFD, DLI & PAR Maps
Free

This app measures light intensity for plants, converting LUX to PPFD and DLI. It offers advanced light mapping, uniformity analysis, and efficiency insights to optimize plant growth. Customize profiles for different environments and growth stages.

LUX, PPFD, DLI, and PAR measurementsLight mapping and distribution analysisUniformity and PPF evaluation
🔧 Utilities
(87)
free with in-app purchases
10
조도계 - 빛 및 노출 측정
조도계 - 빛 및 노출 측정
조도계 - 빛 및 노출 측정
실시간 빛 강도 분석
Free

Measure light intensity and color temperature for photography, plant care, and workspace optimization. Offers real-time readings, shooting recommendations, and manual control for precise lighting adjustments.

Real-time color temperature readingsLux and Foot Candle measurementsAverage and Max light values
🔧 Utilities
(197)
free with in-app purchases
11
Light Meter: Lux-525 Pro
Light Meter: Lux-525 Pro
Light Meter: Lux-525 Pro
Measure light intensity & cct
Free

This app functions as a precise and user-friendly light meter using your phone's built-in sensors. It measures illuminance, color temperature, PPFD/PAR, DLI, and luminous flux in real-time. It also includes a calculator for various illumination parameters and allows sharing or saving of measurements.

Real-time illuminance measurementColor temperature measurementPPFD/PAR and DLI calculation
🔧 Utilities
(113)
free with in-app purchases
12
Lux Light Meter Pro for Photo
Lux Light Meter Pro for Photo
Lux Light Meter Pro for Photo
LightMeter & Exposure Value EV
Free

This app provides precise light measurements in lux and foot candles, along with real-time color temperature readings. It offers shooting value recommendations and allows manual adjustment of camera settings for photographers, plant enthusiasts, and workspace optimization.

Real-time color temperature measurementLux and foot candles light measurementsAverage and max light values
🔧 Utilities
(440)
subscription
13
Plant Light Meter: Lux & PPFD
Plant Light Meter: Lux & PPFD
Plant Light Meter: Lux & PPFD
Measure Light for Houseplants
Free

This app helps indoor plant owners determine if their plants are receiving adequate light. It uses your device's camera to measure light intensity in Lux and Foot Candle units, offering plant recommendations based on your readings. Track light changes over time and optimize plant placement for healthier growth.

Measures light in Lux and Foot CandlePlant recommendations based on light levelsManual and continuous measurement modes
🔧 Utilities
(11)
free with in-app purchases
14
Plantion - Plant Identifier
Plantion - Plant Identifier
Plantion - Plant Identifier
Scan diagnose treat disease id
Free

Identify your plants, diagnose issues like brown leaves, and receive personalized care instructions. This app helps you determine watering schedules, optimal lighting, and provides timely reminders to keep your plants thriving.

Plant identificationDisease diagnosisWatering calculator
📚 Education
(9.4K)
free with in-app purchases
15
Light Meter・Lux Meter
Light Meter・Lux Meter
Light Meter・Lux Meter
Check exposure, plants & rooms
Free

This utility app transforms your smartphone into a professional light measurement tool, offering precise real-time readings in lux, foot-candle, and EV. It helps users meet lighting standards for various environments and optimize conditions for plant growth, with features for tracking changes over time.

Real-time lux, foot-candle, and EV readingsVisual brightness indicatorCheck lighting standards for spaces
🔧 Utilities
(2)
free with in-app purchases
16
LUX Meter - Photo Light Meter
LUX Meter - Photo Light Meter
LUX Meter - Photo Light Meter
Measure light for photoshoot
Free

This utility app precisely measures light intensity in LUX and color temperature in Kelvin. It provides real-time exposure readings for photoshoots and filming, helping users adjust lighting for optimal results.

Real-time color temperature measurementLight measurement in LUXReal-time heat measurement (Kelvin)
🔧 Utilities
(1)
free with in-app purchases
17
LUX Meter - Light Meter
LUX Meter - Light Meter
LUX Meter - Light Meter
Illuminance for photo & plants
Free

This app measures ambient light levels in lux or foot-candles using your iPhone camera. It provides instant feedback on whether a space is too dim, comfortable, or bright enough for various tasks and offers calibration options.

Lux and foot-candle readingsLighting target presetsLive brightness scale
🔧 Utilities
(1)
free
18
Luminometer: Lux Light Meter
Luminometer: Lux Light Meter
Luminometer: Lux Light Meter
Measure Luminosity in LM & FC
Free

Transform your device into a professional light meter to measure luminosity in lux and foot-candles. Achieve optimal illumination for any space, from greenhouses to workspaces, ensuring comfort and preventing glare. Calibrated with reference equipment for precise and reliable readings.

Measures lux and foot-candle unitsInternal Exposure Compensation for accuracyCamera view for measured area
🔧 Utilities
(13)
free with in-app purchases
19
Plant Identifier: ChatPlant AI
Plant Identifier: ChatPlant AI
Plant Identifier: ChatPlant AI
Plant ID, Diagnose, Care Guide
Free

Instantly identify plants, flowers, and trees with high accuracy using your phone's camera. Get expert advice on plant care, diagnose diseases, and receive reminders for watering and sunlight. Safely identify toxic plants and manage your plant collection.

AI-powered plant identificationDisease diagnosis and treatmentPersonalized plant care reminders
📚 Education
(4.6K)
free with in-app purchases
20
Grow Calc: Plant Light Meter
Grow Calc: Plant Light Meter
Grow Calc: Plant Light Meter
Gardening, Plants & Farming
Free
🔧 Utilities
(0)

FAQ about Light Meter Free Plant

What are the best light meter free plant apps for iPhone?
Photone - Grow Light Meter tops our light meter free plant apps ranking as of July 2026, with a 4.6-star average from 4.9K App Store ratings, and it's free to download.
Photone - Grow Light Meter has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 240+ light meter free plant apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Photone is a mobile application that functions as a highly accurate light meter for plants. It uses your device's camera to measure various light metrics such as PAR, PPFD, DLI, lux, foot-candles, and color temperature (kelvin). This data helps users understand and optimize the lighting conditions for their plants.
Key features include industry-leading accuracy comparable to professional PAR sensors, pre-calibration for your specific device, and excellent low light sensitivity. It also offers in-app guides, light source selection for different grow lights, and a hands-free 'read aloud' function. Some advanced features like Extended PAR and underwater measurement modes require an in-app purchase.