RMClock is described as 'RightMark CPU Clock Utility (RMClock) is a small GUI application designed for real-time CPU frequency, throttling and load level monitoring and on-the-fly adjustment of the CPU performance level on supported CPU models via processors power management model-specific registers' and is an app. There are more than 10 alternatives to RMClock for Windows, Linux, Flathub and Mac. The best RMClock alternative is TLP – Linux Advanced Power Management, which is both free and Open Source. Other great apps like RMClock are UPower, Lm-Sensors, Sysinfo and Laptop Mode Tools.