All mobile devices has an automatic screen timeout feature to save battery. This feature is enabled by default and the screen will turned off automatically after a pre-determined time. While this feature saves battery, some apps need to stay on all along, for example media players, eBook readers, browsers, etc. In Android device, applications uses wakelock mechanism to stay awake the device.
Though several Android apps have built-in wakelock mechanism to stay on, many don’t have. If you need a particular app to stay on, you can do it with a simple app called KeepScreen.
KeepScreen helps you to prevent screen timeout when you’re using applications like browser, media player or like that. However, it’ll deactivate timeout only when you are using preselected apps.
After installing KeepScreen run it and select the “Applications” menu. Click on the app that you want to disable the screen timeout.
Run KeepScreen with the start/stop service menu, and then test by opening the application and see that you will never have screen timeout.