Night screen applications is good. This is good when we are working on night or dark then this will help you to adjust the screen brightness. The concept of this application is clear and simple. If I talked about the layout and design then this is very simple and easy to handle. The app is very low MB so you can easily download from your play store. The feature of this application ia that you can handle the brightness as per your decision. The function is also good. But almost phone have the brightness adjustment setting so this will not important as much.its useful but not important.