Monocle

Monocle is a macOS‑only utility that lets users adjust the brightness of individual application windows, providing a way to dim or brighten specific content without affecting the overall display settings. It operates by overlaying a translucent layer on the target window, allowing fine‑grained control of perceived luminance while preserving the underlying window’s functionality. The tool is positioned for users who need to reduce eye strain or improve focus when working with multiple windows, such as developers, designers, or anyone juggling several applications simultaneously. Its implementation follows standard macOS conventions, offering a stable, lightweight experience that integrates directly with the operating system’s window management.