PixelCheck: Dead Pixel Test

Buying a used iPhone? Just had your screen repaired? PixelCheck gives you four quick tests to verify your display is perfect. DEAD PIXEL TEST Cycle through 8 full-screen colors — white, black, red, green, blue, yellow, cyan, and magenta. Dead pixels and stuck pixels stand out immediately against solid colors. Tap to cycle, swipe to go back. TOUCH SCREEN TEST Draw across a grid overlay to verify every zone of your touch screen responds. Track your coverage in real time and make sure there are no dead spots. OLED BURN-IN TEST A slow-moving gray block and uniform gray screen reveal ghost images, uneven brightness, and burn-in damage on OLED displays. Adjust the gray level to catch subtle issues. SCREEN INFO View your device model, screen resolution, pixel density, display type, refresh rate, and current brightness — all in one place. WHY PIXELCHECK? - No ads, no tracking, no internet required - Works completely offline - Tiny app size, instant launch - Supports iPhone and iPad - Built for one job and does it well PERFECT FOR - Buying a used iPhone or iPad - Checking a screen after repair - Verifying OLED burn-in on older devices - Testing touch response across the full screen Simple, fast, private. Open the app, run the test, know your screen.