WattSeal

WattSeal is a free, open-source desktop app that shows you exactly how much power your PC consumes — broken down by application and by hardware component, updated in real time. Unlike Task Manager (which shows CPU %, not watts) or HWiNFO (which reads sensors but can't map them to your software), WattSeal bridges hardware telemetry and running processes into a single unified view. It's the only tool that tells you not just that your GPU is drawing 180W, but which app is responsible. Key features: Per-app power breakdown — see watts, electricity cost, and CO₂ per running process Per-component monitoring — CPU, GPU, RAM, storage, and network, individually tracked Carbon footprint tracker — automatically converts consumption to CO₂ based on your local grid (France 42 gCO₂/kWh, USA 384, China 555, or custom) Electricity cost calculator — know your PC's real impact on your bill Historical charts — spot trends over time with real-time, 1-min, 1-hour, or custom views Local SQLite database — all data stays on your machine, queryable for custom analytics Near-zero overhead — built in Rust, runs silently in the background No telemetry, no cloud, no tracking — 100% private Reads directly from hardware sensors via RAPL (Intel/AMD CPUs), NVML (NVIDIA GPUs), and ADLX (AMD GPUs). Validated against real smart plug measurements. Works on Windows, macOS, and Linux — single executable, no installation required. Available in English and French. Free and open source under GPLv3.