Screen Tester

Screen Tester is a simple and reliable tool designed to help users check the visual quality of their device display. It provides clean, full-screen colour screens, patterns, gradients, and smooth animations that make it easier to identify potential screen issues such as dead pixels, stuck pixels, colour inconsistencies, uneven brightness, faint burn-in, and ghosting. All tests are visual only and do not modify your device settings or hardware.
The app includes multiple testing modes. The Solid Colour Test displays bright full-screen colours such as red, green, blue, white, black, yellow, magenta, cyan. These screens are useful for spotting pixel problems, light bleed, discoloration, and uniformity issues across the display. Users can tap to switch colour or go through them at their own pace.
The Auto Slide Test automatically cycles through colours every few seconds, providing a hands-free way to observe long-term colour transitions, and potential retention issues. This is helpful for users who want to monitor their screens without interacting constantly.
The Gradient Test helps identify banding, uneven blending, and smoothness issues in subtle colour transitions. Many displays reveal imperfections when gradients are shown, making this feature valuable for checking uniformity and depth.
The Fade Test animates smooth transitions between red, green, and blue, highlighting potential ghosting, pixel response issues, and minor colour retention problems. This dynamic test offers insight into how the screen handles continuous motion.
The Checker Pattern Test shows a high-contrast black-and-white grid used to observe pixel sharpness, alignment, contrast handling, and potential uneven zones. This is useful for identifying display dots that do not appear on simple colour screens.
The app features a simple home menu that gives fast access to every test. Users can start a quick test, choose a specific colour or explore other display checks. The interface is clean, easy to use, and accessible for both beginners and advanced users.
Screen Tester collects no personal data, requires no internet connection, and does not use ads or trackers. It operates entirely offline and focuses solely on providing visual tools for examining display quality. The app does not claim to repair hardware or improve screen performance; it only provides a visual reference to help users understand their display condition.
Screen Tester works on a wide range of devices including LCD, and other display technologies. Whether you are checking a new phone, evaluating a used device, looking for screen issues, or simply curious about your display, this app provides a straightforward and accurate way to test it.