Light MeterLight Meter
A light meter for your film camera. Set your film's ISO, choose the aperture or the shutter speed, and Light Meter suggests the other in full or half stops, with the EV and a hold button. A lux mode measures the light on your plants. The meter is free for iPhone and Android, with no ads and no account; Light Meter Pro adds spot metering, ⅓ stops, camera and film presets with reciprocity, filters, notes for every roll and grow light PPFD and DLI.
Honest note
The app measures light the way your phone's camera sees it. It is a practical guide, not a lab instrument: calibrate it once against a meter or camera you trust.
The app measures light the way your phone's camera sees it. It is a practical guide, not a lab instrument: calibrate it once against a meter or camera you trust.