Screen check

VKT Screen

Fill the screen with solid colours to find dead pixels, stuck pixels and uneven backlighting. No quota, no payment, no upload — just colours.

How it works

Open the app and hold the device at arm’s length.
Step through the test colours and the greyscale ramp.
Tap to freeze a colour when you spot something.
Read the summary at the end and count what you found.

What you get

Standard sRGB test colours, plus an equal-luminance grey ramp
Full-screen view without browser chrome
Mark what you found, clear the marks per colour
No results are stored or sent anywhere

Offline and private

The app caches itself on first load and then runs entirely on your device. Nothing is uploaded and no server holds your data.

Other apps in the series

Cut things in half

Break the glass