Night - 카카오톡 테마 is a free Android app developed by W2D_what2do. As the name suggests, it is a theme for the popular messaging app, KakaoTalk. Before applying the theme, users need to install KakaoTalk on their device. Once the app is installed, users can download the Night theme and apply it by launching the theme app and tapping on the "Apply" button. However, it is important to note that the theme is only compatible with KakaoTalk version 8.0 or higher.

The Night theme is designed to give a sleek and dark look to the KakaoTalk interface. The app icon, chat bubbles, and background are all changed to a dark color palette, making it easier on the eyes in low-light conditions. The theme is available for free and can be downloaded from the developer's blog or by contacting them via email for any theme-related queries.