Lux Meter: Light Meter & Log

Looking for a light meter? This app uses your smartphone’s light sensor (on supported devices) to quickly and clearly measure ambient brightness (LUX) and lets you save measurements with notes for easy tracking.

Main Features

• Accurate light meter (sensor-based)

- Real-time LUX values displayed on supported devices

- Clean interface that clearly shows changes during measurement

• Measure even without a light sensor

- Estimates LUX using the camera on devices without a sensor

• Save measurement notes

- Attach notes with each reading (e.g., location, situation, lighting setup, plant condition)

• View measurement history

- Organized list of records by date

- Detailed view showing LUX and notes together

• Check light sensor info

- Verify sensor support on your device

- View key details like sensor name, manufacturer, max range, and resolution

Note

- Light readings may vary depending on device model, sensor quality, and measurement conditions (angle, shadows, ambient light).

- On devices without a light sensor, the app shows a camera-based estimate, which can differ from the actual lux level by a factor of two or more.

Recommended for

- Anyone who wants to measure room brightness with numbers instead of guessing if it’s too dark or bright

- People aiming to maintain consistent lighting for desk work, studying, reading, or remote work

- Creators who want to record LUX values with notes when adjusting lighting for photos, live streams, or self-studios

- Store, gallery, or studio owners comparing brightness levels across different spaces

- Parents or homeowners checking lighting in kids’ rooms, living rooms, or bedrooms to reduce eye strain

- Users creating lighting routines for better sleep and rest, like “low light at night, sufficient light during the day”

- Those who want to track brightness changes when switching LED bulbs, lamps, or indirect lighting

- Anyone remodeling or moving who wants to record brightness changes to find the best lighting setup

- Plant, aquarium, or terrarium enthusiasts managing lighting by saving current conditions with notes

- Users who want to keep detailed records of where and under what lighting settings measurements were taken for future comparison

- Anyone curious if their phone has a light sensor and wants to check sensor details (name, range, resolution)

Optimize your lighting environment with this easy-to-use, precise light meter app—perfect for home, office, studio, and more!