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Lux Light Meter: Illuminance

Measure light in seconds and know whether it’s right for your space, camera, or plants.

About the App

Lux Light Meter: Illuminance is a practical lux / illuminance meter for iPhone. It helps you measure ambient light, get photography exposure suggestions, estimate plant lighting (PPFD / DLI), save results, and review history — all with offline measurement.

Phone-based readings are for everyday reference only and cannot replace a calibrated professional illuminance meter or certified inspection.

Key Features

Environment Mode

See lux / fc readings with scene targets (study, office, home, and more), status (too dark / suitable / too bright), and practical adjustment tips.

Photography Mode (Pro)

Aperture- or shutter-priority suggestions with ISO, exposure compensation, and recommended exposure values.

Plant Mode (Pro)

Estimate PPFD and DLI for common houseplants, with light-source and daily photoperiod options.

Records & Continuous Measure

Save single measurements, track light changes over time, and review min / average / max values.

Calibration

Optional calibration against a trusted meter, with independent factors for front and rear cameras (Pro).

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