Vitals 

Vitals  is a Mac activity monitor designed for developers, power users, and system administrators who need a clearer view of their system's health. Unlike traditional activity monitors that display thousands of processes, Vitals intelligently groups related processes by the app that launched them, providing a simplified and more meaningful overview. It tracks key metrics such as memory, CPU, energy, disk, and network usage, while also monitoring temperatures, fans, and battery status. Users can keep 30 days of historical data, receive alerts for misbehaving apps, and identify forgotten development servers, making it an invaluable tool for troubleshooting and system optimization. Its customizable menu bar interface allows users to arrange readouts to suit their workflow, all with a one-time payment and no need for accounts or subscriptions. Vitals stands out for its focus on app-level insights and user-friendly design, making complex system data accessible and actionable.