Display Tester is a useful tool for testing mobile devices and quickly detecting any abnormalities. With a variety of tests to choose from, users can easily find the one that suits their specific needs. These tests are simple to perform and provide accurate results, giving users complete trust in the application. The color and contrast of the device will be promptly evaluated and commented on, and the viewing angle of the screen will also be checked for any unusual occurrences. However, it is worth noting that these tests are not compatible with OLED phone screens. Each test requires users to perform various gestures, such as tapping, swiping, shaking, and moving objects on the screen. Some mobile devices may experience frustrating and hard-to-detect screen errors, such as burn-in. These errors can result in faint images or a completely black screen, making it challenging to use the phone. Fortunately, Display Tester has a solution for this problem. By using black and white bars, the application can significantly improve the visibility of the screen and gradually eliminate black streaks. Upon starting the application, it will record the device’s parameters, including the serial number, model, activation time, CPU, and GPU. Additionally, users can access more detailed information about their screen’s specifications, such as resolution, refresh rate, and pixel density.