Plant Light Meter: Lux Test

Plant Lux Meter turns your phone into a simple, accurate ambient light (lux) meter for houseplants—so you stop guessing whether a shelf or window really gives enough light. Why it matters Too little light—stretched stems and yellow leaves. Too much—burned foliage. This app reads real lux from your device so you can place plants with confidence. What you can do Live lux — see light levels update in real time. Timed scan — averaged reading when you want a stable number. Compatible plants — suggestions aligned to your current lux range. Plant guide — browse and search a large plant library; save favorites. History — keep named measurements (e.g. “North window, morning”) for your own notes. Custom plants — add your own entries with care details and optional photos. Everything stays on your device. Privacy, by design No account required. Your notes, favorites, custom plants, and measurement history are stored locally on your phone—not on our servers. Plant Lux Pro (optional) Upgrade for an ad-light experience and extra tools like export, charts, advanced filters, plant comparison, longer timed scans, and more—ideal if you revisit lighting often. Requirements Works best on phones with an ambient light sensor. If your device lacks one, the app will show an error—most mid-range and flagship Android devices are supported. Perfect for Plant parents, renters optimizing shelves and windows, and anyone who wants data-backed light—not vibes only