The suitable light intensity is very important in the life. It affects health and work efficiency. Therefore, you need to know the current brightness level in your environment to adjust accordingly. You don't need to buy an expensive light meter, you can use your own smartphone. Our light meter, lux meter application is a free tool to measure light intensity (Lux/Fc). With this app, you can now measure the brightness level at work, school, home or anywhere with your smartphone. It has a simple i