Lux Light Meter: Illuminance

Lux Light Meter: Illuminance

A practical lux and illuminance meter for iPhone. Measure ambient light in seconds, check if a room is bright enough for study, work, or home use, and get helpful exposure and plant-lighting guidance when you need it. Core metering works offline.

Key Features:

Ambient light metering - Live lux / fc readings with scene targets that tell you if the light is too dim, about right, or too bright — plus simple tips to adjust

Photography mode (Pro) - Aperture- or shutter-priority suggestions with ISO and exposure compensation so you can dial in exposure faster

Plant mode (Pro) - Estimate PPFD and DLI for common houseplants, with light source and daily photoperiod options

Continuous measure & history - Save single readings, track how light changes over time, and review min, average, and max values

Optional calibration - Fine-tune against a trusted meter; Pro saves separate factors for the front and rear cameras

Units & privacy-friendly storage - Switch between lux and fc; your measurements stay on your device

How to Use:

Open the app, allow camera access, and point your iPhone at the area you want to measure. Switch between Environment, Photography, and Plant modes, then save a reading or run a continuous measurement when you need a longer sample.

Subscription Options:

* Weekly and yearly subscriptions, plus a lifetime purchase

* Payment will be charged to your Apple ID account

* Subscriptions renew automatically within 24 hours before the current period ends

* Manage or cancel anytime in your Account Settings

Clearer readings. Better light decisions.

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