Show HN: Nightwatch – a Mac menu-bar app that tells you when tonight is clear
Summary
Nightwatch is a silent macOS menu-bar app that tells you when tonight is clear enough for telescope imaging and what to point at. It fetches weather and sky data from WeatherKit, Open-Meteo, and 7Timer, computes astronomical darkness and target visibility with Astronomy Engine, and presents a rich Targets view with favorites, week ahead, and dark-site information. The project is open source (MIT) and includes detailed setup, widgets, and cross-device settings synchronization.