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Best Free Plant Light Meter Apps

239+ iOS apps curated and reviewed

4.3 avg rating
17 free apps
Updated June 2026

The best free plant light meter apps on iPhone average 4.3★ across 239+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.

Top Picks for Free Plant Light Meter

Photone - Grow Light Meter#2

Photone - Grow Light Meter by Lightray Innovation GmbH

Perfectly light your plants!
Strong Contender
🔧 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

An app designed to help optimize plant lighting by measuring PAR, lux, and kelvin, aiding in maximizing yield while minimizing energy consumption. Additionally, it offers helpful articles, a plant lighting calculator, and a Pro subscription for advanced features and resources to support plant growth. Visit the website to learn more.

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
Plant Light Meter#3

Plant Light Meter by Studio Nano Ship, Inc.

For houseplants
Worth Considering
🔧 Utilities
4.6😞(1K ratings)
$2.99
#94in Utilities
Plant Light Meter screenshot 1
Plant Light Meter screenshot 2
Plant Light Meter screenshot 3
Plant Light Meter screenshot 4
Plant Light Meter screenshot 5
Plant Light Meter screenshot 6

Measure your houseplants' ideal light levels with this application. Simply point your camera at the plant's leaves and press "Measure" to ensure your plants thrive in optimal light conditions.

What We Love

  • 👍 Easy to use
  • 🚀 Accurate and helpful
  • 💡 Useful for newbie plant owners
  • 💡 Saves time and guesswork

Room to Improve

  • 🐛 Limited plant database
  • 🐛 Inaccurate readings
  • 🐛 Measures leaf color, not light

More Free Plant Light Meter apps to explore

4
Light Meter LM-3000
Light Meter LM-3000
Light Meter LM-3000
Simple & accurate measurement!
Free

Measure light intensity accurately with the Light Meter LM-3000 app, offering a user-friendly interface for quick and precise readings. Enhance your lighting setups with this essential tool.

🔧 Utilities
(2.4K)
5
Light Meter for Plant LUX & FC
Light Meter for Plant LUX & FC
Light Meter for Plant LUX & FC
Measure Light for Houseplants
Free

This light meter app helps you measure and optimize lighting levels for your houseplants, ensuring they receive the right amount of light to stay healthy. With this tool, you can easily measure lux and foot candle levels, save readings, and make informed decisions to give your plants the best chance to thrive.

🔧 Utilities
(9)
6
Bask Light Meter
Bask Light Meter
Bask Light Meter
Measure light for your plants
Free

Use your phone's camera to measure sunlight and find the perfect spot for your house plants to thrive. Download the app to start optimizing your plant placement today.

🌟 Lifestyle
(2)
7
Lux Light Meter Pro
Lux Light Meter Pro
Lux Light Meter Pro
Measure Luminosity in Lux & FC
Free

Measure luminosity in lux using Lux Light Meter Pro, a user-friendly application that provides accurate light intensity readings for various settings. Get precise measurements and optimize lighting conditions with ease.

🔧 Utilities
(5K)
8
Planta: AI Plant & Garden Care
Planta: AI Plant & Garden Care
Planta: AI Plant & Garden Care
Happy Life, Happy Plants!
Free

Planta: Complete Plant Care helps you keep track of your plant watering schedule, providing reminders and care tips for each plant. Download now to ensure your plants thrive with proper care.

🌟 Lifestyle
(339)
9
PPFD METER - Grow Light Meter
PPFD METER - Grow Light Meter
PPFD METER - Grow Light Meter
LUX, PAR, PPFD, DLI & PAR Maps
Free

This application helps gardeners optimize plant growth by providing precise light measurements and in-depth analysis, converting LUX readings into PPFD and DLI, and offering customizable profiles and advanced light mapping. Download it today to take your plant care to the next level with precision and expertise.

🔧 Utilities
(87)
10
Light Meter · Lux Meter
Light Meter · Lux Meter
Light Meter · Lux Meter
Exposure Meter · Foot Candle
Free
🔧 Utilities
(2)
11
VIVOSUN
VIVOSUN
VIVOSUN
All for grow
Free

Automate and simplify the science of growing with the Smart Grow System - monitor and control all aspects of your grow setup, track plant growth with diaries, and shop securely with free shipping on orders over $59. Start optimizing your growth today!

🔧 Utilities
(7.8K)
12
Light Meter For Plants
Light Meter For Plants
Light Meter For Plants
Measure light for your plants
Free
🌟 Lifestyle
(2)
13
PlantLight - Light for Plants
PlantLight - Light for Plants
PlantLight - Light for Plants
Find the right light
Free
🌟 Lifestyle
(0)
14
Light Meter: Lux-525 Pro
Light Meter: Lux-525 Pro
Light Meter: Lux-525 Pro
Measure light intensity & cct
Free

Measure light intensity with precision using the Lux-525 Pro Light Meter app. Get accurate readings of light levels in any setting, helping you adjust lighting conditions for optimal productivity and comfort. Download now to experience enhanced control over your environment.

🔧 Utilities
(113)
15
Plant Identifier, Care: Planty
Plant Identifier, Care: Planty
Plant Identifier, Care: Planty
Tree Identification, Ad- Free
Free

Download Planty now to easily care for your plants, identify trees, and improve your gardening skills. Grow healthier plants and become a better plant parent with Planty!

📚 Education
(37K)
16
PlantIn: Plant Identifier・Care
PlantIn: Plant Identifier・Care
PlantIn: Plant Identifier・Care
Disease diagnosis・advice app
Free

PlantIn is your go-to plant care companion! Identify plants, receive personalized care plans, use tools like the Watering Calculator and Light Meter, get care notifications, consult with gardening experts, and even identify mushrooms. Let's make the world greener together! Stay plantuned for more. Check out the app now!

📚 Education
(223K)
17
Lux Light Meter Pro for Photo
Lux Light Meter Pro for Photo
Lux Light Meter Pro for Photo
LightMeter & Exposure Value EV
Free

"Lux Light Meter Pro for Photo" is a handy tool that accurately measures light levels for photographers. With its user-friendly interface and precise readings, this app helps photographers achieve optimal lighting conditions for their photos. Download now for professional-grade light measurement in your pocket.

🔧 Utilities
(434)
18
Plantion - Plant Identifier
Plantion - Plant Identifier
Plantion - Plant Identifier
Scan diagnose treat disease id
Free

Transform your plant care with Plantion! Easily identify, water, and troubleshoot your plants using features like the Watering Calculator, Light Meter, and personalized Care Plans. Stay on top of your plant care routine with Care Notifications and watch your green friends thrive. Start giving your plants the best care today!

📚 Education
(9.4K)
19
Light Meter - lux and foot candle measurement tool
Light Meter - lux and foot candle measurement tool
Light Meter - lux and foot candle measurement tool
by Marina Polyanskaya
$1.99

Measure light intensity with precision using our convenient and user-friendly light meter app. Enjoy real-time measurements, average and max values, indoor/outdoor modes, and more. Download now for accurate lux and foot candle measurements on the go!

🔧 Utilities
(118)
20
Pocket Lux Meter
Pocket Lux Meter
Pocket Lux Meter
Measure Luminosity in Lm & Fc
$1.49
$1.99 | 25% OFF

Measure luminosity in lumens using your smartphone camera. Easily track and analyze light intensity for various purposes. Get the app now to accurately measure luminosity on-the-go.

🔧 Utilities
(56)

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