Leaflux

Is this spot bright enough for your plant?

Leaflux reads light with your iPhone camera, turns it into PPFD and daily light, and gives you a plain answer: keep it there, move it closer, or filter the sun.

Daylight, LEDs, purple lights

Each light source has its own conversion, because a lux of sunlight and a lux of a pink grow panel are not the same amount of plant light.

13 plant groups

From ZZ plants and ferns to hoyas, succulents and agave, each with a comfortable daily range.

A day, not a moment

Save a few readings to a spot through the day and Leaflux averages them into a daily figure.

Honest about accuracy

A phone camera isn't a quantum sensor. Leaflux shows how sure each reading is, and lets you calibrate against a real meter.

Free to measure daylight.

One purchase adds every light source, daily light (DLI) and plant ranges. No subscription, no account, no ads, no tracking.

Made for iPhone Duo too

Open it up and the reading sits beside the advice. Fold it like a book and nothing lands in the crease; the meter keeps clear of the inner camera while it measures.