A macOS menu bar app that shows what your Mac is doing with power: adapter input, system load, battery charge/discharge, SoC and screen draw, plus battery health, temperature, cycle count, and adapter details.
It reads live values from the SMC and IOKit and keeps a rolling history in a small chart.
Credit: this is a Swift rewrite of the original Powerflow by lzt1008. I liked the functionality but not the overhead (size, memory) due to JS/Tauri being used. The whole bundle is now ~820 KB.
I don't have an Apple Devleoper account so the simplest way to use the app yourself is to clone this repository, then build it:
./build-app.shThis produces Powerflow.app — a self-contained bundle. Drag it to /Applications and launch it; it lives in the menu bar with no Dock icon.
This was entirely coded with Claude's support; I am not an expert Swift developer. The app icon was created with FLUX.1 via DrawThings.