LED Light Flicker Meter

Contechity

In-app purchases

About this app

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 flickering lights. With this app you can measure if your LED lamps, LED bulbs, fluorescent tube lights and screens are flickering and how much.

How to Use the App?
Place the phone in a position so that the camera is facing a surface, such as a white paper, an evenly colored wall or a floor, that is lighten by the light source you want to measure the flickering from. It is very important to let the phone stand still during the measurements as movement can cause the meter to measure a too high flickering value.

What is a Flickering Percentage?
The percentage flickering is the apps estimation of the difference between the maximum and minimum light output from a light source. A flickering measurement value of 25% means that the minimum light varies between 75% and 100% light output. A light that switches off completely in each cycle will have a flickering measurement of nearly 100%. A light that does not vary in light output will have a flickering measurement of nearly 0%.

How Accurate are the Measurements?
As long as the phone during measurements is standing absolutely still, without any movements and are directed towards an even surface, the accuracy seems to be within plus/minus five percentage points under normal circumstances on most devices.

Contact
I am always interested in hearing from you. Feel free to contact me with questions, complaints and improvement ideas. I try to answer all emails.
[e-mail]

Ratings and reviews

Hello 😊, dear developpers 😊, thank you very much for your beautiful app. Flicker meter is indeed a very useful application! This app is very important for those who want to save their eyesight. I bought one of the latest smartphones, and didn't know why I had so extreme eyestrain :(, thanks to Flicker Meter I found out such a thing known as PWM (pulse width modulation). This PWM is extremely bad for eyes 👀. I recommend everyone to test every display with Flicker Meter before using!

Works well, it seems. Tested on Philips wake-up lamp, massive flickering. Hue light strips? Nothing. PC screen? Nada. OLED? yep.

Works, was able to detect that a led strip was flickering a lot. Fixed by adding 10000uF capacitor on driver output side. According to app flickering decreased from 97% to 38%. And the eye strain i could previously feel when observing the light was gone. And now I know to avoid that brand of led drivers. Useful for detecting flickering beyond what the eye can perceive, above 60hz or so.

What's new

• Added an automatic warning for too much movement of the device, as detected by gyro and acceleration sensors.
• Misc minor improvements.

Please rate the app here on Google Play - it helps others find the app and gives me incentive to develop it further. Thank You!