Libre Light Sensor is a free utility app available for iPhone users. Developed by John Harrington, this app allows you to measure light levels in any environment using your iPhone's camera. By calculating luminosity in Lux, Libre Light Sensor provides valuable information about the amount of light exposure your eyes receive throughout the day.

With Libre Light Sensor, you can optimize your sleep quality by understanding the light levels when you wake up, during the day, and before bed. The app leverages the camera on your iPhone to accurately measure the amount of light in your surroundings. This objective measurement helps you make informed decisions about your sleep routine and create an environment that promotes better rest.

Whether you're concerned about the brightness of your bedroom, the lighting conditions in your workspace, or the impact of different light sources on your sleep patterns, Libre Light Sensor provides a simple and convenient way to track and monitor light levels. Download this free app today and start optimizing your sleep quality.