Not worth the time.
By the time you figure out how to use it you have to pay.
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Measure light intensity for your plants using your phone's camera. Get lux, foot-candle, and professional PPFD readings for grow lights. Track daily light integral and get plant recommendations based on your environment.
✓Lux and Foot Candle measurement
✓Professional PPFD and PAR readings
✓Daily Light Integral (DLI) tracking
✓Plant name tagging and recommendations
✓Manual and Continuous measurement modes
✓Front and rear camera support
✓Data export as CSV
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What's New in Plant Light Meter
2.4
October 28, 2026
What's new in 2.4: Unlimited free lux and foot-candle measurements Premium: PPFD/DLI, all matching plants, unlimited history, widget 21 new plants (53 in total) Stability improvements
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$2.99
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FAQ
What is Plant Light Meter?
Plant Light Meter is a utility app that uses your iPhone camera to measure light intensity for plants. It provides readings in lux, foot candles, and professional PPFD for grow lights, along with DLI tracking.
Does Plant Light Meter have ads?
No, Plant Light Meter does not contain advertisements. It offers a free version with core lux and foot-candle readings, and a premium upgrade for advanced features.
What are the premium features of Plant Light Meter?
Premium features include professional PPFD/PAR mode, Daily Light Integral (DLI) tracking, and the ability to save more than one measurement to your history. These are available via a one-time purchase.
How accurate are the PPFD readings in Plant Light Meter?
The app offers professional PPFD and PAR readings in μmol/m²/s, designed for grow-light-grade measurements. It allows you to select your light source for more accurate conversions.
Can I track light for specific plants with Plant Light Meter?
Yes, you can tag each measurement with a plant name, choosing from a database of over 50 plants or adding your own. You can then filter saved measurements by plant and see 7-day average lux per plant.
What is Daily Light Integral (DLI) and how does Plant Light Meter track it?
DLI is the total photosynthetic light your plant receives over 24 hours, a key metric for serious growers. Plant Light Meter tracks DLI in continuous mode, allowing you to save daily snapshots and review your DLI history.
What devices does Plant Light Meter support?
Plant Light Meter is currently supported on iPhone devices. It was released on 2022-06-10 and the latest version is 2.4, last updated on 2026-10-28.
What is the user sentiment for Plant Light Meter?
Based on the available data, Plant Light Meter has a rating of 2.2 stars from 13 ratings. This suggests that while some users find value in its features, there may be areas for improvement in user satisfaction.
