Plant Light Meter: Lux & PPFD
Lux Meter for Grow Lights
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Measure your plant's light in seconds — lux, foot candle and pro PPFD/PAR for grow lights. Match 50+ plants and track light over time. Right on your iPhone.
Is your plant getting enough light? Find out in seconds.
Light meter for plants — measures lux and foot candle intensity using your iPhone camera. Plus professional PPFD and PAR readings for grow lights, and Daily Light Integral (DLI) tracking. Designed specifically for indoor plant parents and serious growers.
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WHY YOUR PLANTS NEED A LIGHT METER
After overwatering, insufficient light is the #1 killer of indoor plants. Most plant owners guess — but different species need dramatically different light levels. A Snake Plant thrives in 500 lux. A Fiddle Leaf Fig needs 10,000+.
Stop guessing. Start measuring.
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WHAT MAKES THIS APP DIFFERENT
Unlike generic lux meter apps built for electricians, Light Meter for Plant is designed for plant care:
PROFESSIONAL PPFD & PAR (Premium)
Switch the unit to PPFD for grow-light-grade readings in μmol/m²/s. Pick your light source (Sunlight, Cool LED, Warm LED, HPS, Fluorescent) for accurate conversions. PAR estimates included.
DAILY LIGHT INTEGRAL (DLI)
In continuous mode, the app tracks the total photosynthetic light your plant receives over 24 hours — the metric serious growers care about most. Save daily snapshots and review your DLI history.
PLANT NAME TAGGING
Tag each measurement with a plant name — pick from our 50+ plant database or add your own. Filter saved measurements by plant. See 7-day average lux per plant.
PLANT RECOMMENDATIONS
After every measurement, see which plants thrive in your current light conditions. 50+ plants with specific lux ranges.
TWO MEASUREMENT MODES
- Manual: Tap to take a single reading
- Continuous: Real-time live monitoring with MIN, MAX, and AVG values
THREE UNITS
Switch between Lux, Foot Candle, and PPFD instantly. No conversion calculators needed.
FRONT & REAR CAMERA
Use your front camera for quick checks, or rear camera for precise readings in hard-to-reach spots.
SAVE & COMPARE
Save measurements with notes and plant tags. Track how light changes by window, season, or time of day. Export your data as CSV.
LIGHT CATEGORIES
Visual indicators show exactly where your reading falls:
- Dark (0–500 lux) — Low light, far from windows
- Shade (500–1,000 lux) — North-facing windows
- Part Sun (1,000–4,000 lux) — East or west windows
- Full Sun (4,000–5,000 lux) — South-facing windows
- Direct Sun (5,000+ lux) — Direct sunlight exposure
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PERFECT FOR
- Indoor plant parents checking window light levels
- Grow light users measuring PPFD output
- Cannabis & vegetable growers tracking DLI
- Office workers optimizing desk plant placement
- Plant shop owners measuring display areas
- Hydroponics enthusiasts
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SIMPLE PRICING
Free: 10 measurements per day, plus a free taste of PPFD.
Premium: PPFD/PAR mode, DLI tracking, unlimited measurements and saves.
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Disclaimer: Light Meter for Plant uses your device camera sensor and provides estimated lux/PPFD values. For professional research-grade measurements, please use a dedicated quantum meter.
Privacy Policy: https://kurtulusahmet.com/lightmeter/privacy-policy.html
Terms of Use: https://kurtulusahmet.com/lightmeter/term-of-use.html
What's new in 2.3:
10 free measurements a day, plus a free taste of PPFD
Smoother rating & feedback
Stability & performance improvements
The developer, Kurtulus Ahmet TEMEL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kurtulus Ahmet TEMEL
- Size
- 35.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Life Time Premium $2.99
- Copyright
- © Kurtulus Ahmet TEMEL