Apps to Fan speed control

Sidebar Diagnostics is a lightweight, customizable sidebar for Windows that provides real-time monitoring of your system's hardware, including CPU temperature, memory usage, fan speeds, and more. It's designed to be unobtrusive while keeping essential performance data readily available.

Fan Control is a comprehensive utility for macOS that empowers users to fine-tune and monitor the cooling system of their Intel-based MacBooks. Gain control over fan speeds based on various system temperatures and other hardware metrics, ensuring optimal performance and managing thermal output.

Open Hardware Monitor is a free and open-source software designed to provide comprehensive monitoring of critical hardware components. It tracks temperatures, fan speeds, voltages, load, and clock speeds for a wide range of system components, including CPU, GPU, motherboard, and hard drives, making it an essential tool for system health assessment and troubleshooting.