A light meter tells you how bright it is now. LeafLight tells you whether your plant gets enough light across the whole day.

Features

• Measures the whole day

  Stand the phone beside the pot and tap start. Every 30 seconds it reads light from the camera's exposure data and builds the day's light curve.

• Moved phones can't cheat

  Motion sensing removes any stretch where the phone was moved, so a phone carried about can't fake a sunny spot.

• Verdict against your plant's needs

  See effective light hours compared with what your plant needs: enough, borderline, or not enough. Shown as a ratio, not absolute lux.

• Plant list and spot comparison

  Built-in houseplants and herbs with their light-hour needs. Save your spots and compare two of them side by side.

• Everything stays on your device

  No account, no cloud, no photos stored. LeafLight does not use the internet.

Screenshots

FAQ

• Does the app save photos from the camera?

  No. The camera is used only to read brightness from its exposure settings. No images or video frames are saved.

• Is this an exact lux or PPFD reading?

  No. LeafLight shows effective light hours as a ratio to your plant's needs. It is not an absolute light measurement and does not diagnose plant health.

• Does it measure when the app is closed?

  No. Measurement runs only while the app is open on screen. Keep the phone beside the pot with the app running; the screen dims to save power.

• Why does the phone have to stay still?

  Any span where the phone was moved is excluded from the result, so a phone that has been carried about can't count as a sunny spot.