PlantLux - Plants Light Meter

Get to know the light around your plants. Plant Lux uses your iPhone’s camera to estimate brightness, helping you explore the light near windows, on shelves, and in your favorite plant corners. COMPARE TWO SPOTS Take readings in two locations and compare their estimated brightness side by side. CHECK LIGHT AT A GLANCE View live estimates in lux or foot-candles. Hold a reading when you’re ready to take a closer look. KEEP A LIGHT JOURNAL Save readings with names and notes. Revisit your history to compare observations at different times of day. LEARN THE BASICS Find simple measurement instructions and general explanations of plant-light levels. NO SUBSCRIPTION All measurement features are available without a subscription. The app includes ads, with an optional one-time purchase to remove them. ABOUT THE ESTIMATES Plant Lux estimates illuminance from camera exposure. Results vary with your iPhone, camera angle, scene colors, and reflections. It is not a calibrated light meter and does not measure daily light exposure or provide species-specific recommendations. Use a dedicated meter when accurate measurements are needed. Camera images are never saved or uploaded by Plant Lux.