Bing Wallpaper Now is a desktop application that fetches Bing’s daily wallpaper and sets it as the desktop background. It is built with Tauri 2.0, using a Rust backend and a React frontend, and runs on Windows and macOS. The app detects portrait monitors and downloads matching portrait images, and on macOS it applies the wallpaper across all displays. It runs from the system tray, stores downloaded images locally and cleans older cached wallpapers automatically.