The Zagg Invisible Shield Glare Reduction does help reduce the glare in bright light and sunlight. When I bought it I was skeptical at first thinking that they were making a claim that they probably could not live up to; but, I took a chance and was pleasantly surprised. It does a decent job at cutting the glare. Do not expect miracles. But, it is a vast improvement from having nothing at all. I would recommend buying one if you are looking for something to help with that pesky headache of glare keeping you from being able to see your screen in sunlight and bright light.