Have you experienced eye strain, headache, migraine or other symptoms from being exposed to flickering lights or screens? Use this app to measure which lights or screens are flickering and how much and which are flicker-free! This app measures flickering of light that are flickering/blinking so quickly so that we cannot usually see it with our eyes. But it can still have a negative affect on us - eye strain, headaches, migraines and even epilepsy seizures are reported as consequences of flicker