ScreenTester is a must have tool for anyone who is going to check a phone's screen. If you are buying phone or would like to make sure that your phone's screen is perfect, check device with this app.
6 classic LCD monitor tests help you find defective pixels, explore brightness and colors capabilities, and use your phone as color flashlight. :)

• Color Test
• Resolution Test
• Moire Test
• Diagonal Gradient Test
• Gradient Lines Test
• Brightness and Contrast Test