exelban/stats

Stats is a free, open-source macOS application that displays live system performance information directly in your menu bar, the strip of icons at the top right of your Mac's screen. Rather than opening Activity Monitor every time you want to know how your computer is performing, Stats shows you at-a-glance readings for CPU usage, GPU usage, memory consumption, disk activity, network traffic, battery level, fan speeds, temperature sensors, connected Bluetooth devices, and a multi-timezone clock, all as compact widgets in the menu bar. Clicking on any widget expands a more detailed popup view. The app works by reading macOS system metrics at configurable intervals and rendering them as small graphs or numerical readouts using native Swift and macOS APIs. Each feature is a separate module, and you can enable or disable individual modules to control which metrics appear and to manage battery impact. The README notes that the Sensors and Bluetooth modules are the most resource-intensive, and disabling them can reduce CPU and power usage by up to 50 percent in some cases. You would use Stats when you are a Mac user who wants continuous visibility into your system's health without cluttering your desktop or keeping Activity Monitor open. It is particularly useful for developers, power users, or anyone running resource-intensive tasks who wants to notice performance issues as they happen, for example, catching unexpected CPU spikes, tracking memory pressure, or monitoring network throughput during file transfers. The app is built in Swift for macOS Big Sur (11.15) and later, and can be installed via Homebrew or by downloading the DMG directly.