OLED Screen Tester fills your screen with pure colours and patterns so you can diagnose display issues on any Android device in seconds.
HOW IT WORKS
Launch the app, pick a test scenario, and tap the screen to cycle through colours. The display automatically goes fullscreen and brightness jumps to maximum — so problems are impossible to miss. Tap the back gesture or the close button to exit; brightness resets automatically.
TEST SCENARIOS
• All Colours — sweeps through hundreds of hues
• Grayscale — 10-step gradient from black to white
• Black & White — pure #000000 and #FFFFFF only
• RGB Primary — full-screen red, green, blue
• CMY Secondary — cyan, magenta, yellow
• Dead Pixel Check — solid colours to reveal stuck or dead pixels
• Line Pattern — fine horizontal and vertical grid lines
• All Tests — runs every scenario in sequence
WHAT YOU CAN CHECK
• Dead or stuck pixels (a pixel that never changes colour)
• Screen burn-in or image retention (a ghost of a previous image)
• Colour accuracy and tint uniformity
• Backlight bleed on LCD panels
• Brightness uniformity across the display
PERMISSIONS
WRITE_SETTINGS — used only to set brightness to maximum during a test. Brightness is restored automatically when you exit.
SUPPORTED LANGUAGES
English, Deutsch, Français, Español, Italiano, Português, Русский, 日本語, 中文(简体), Türkçe