PixelCheck: Dead Pixel Test

Buying a used iPhone or iPad? Check the screen first. Test for dead pixels, stuck pixels, touch dead zones, and OLED burn-in — no internet required.

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.