Qualcomm Snapdragon devices. Smartmax is the industry leader. It uses a proprietary "CPU Unlocker" that works via a one-time ADB command. Once granted, the app allows you to set the governor to "Performance" or "Schedutil" and lock all cores active.
While true hardware overclocking (changing the CPU clock speed beyond factory limits) is generally impossible without root access, you can "maximize" your performance by forcing your CPU to stay at its highest rated frequency and preventing thermal throttling. Popular "No-Root" Methods for CPU Maximization : max all cpu core no root apk download
: One-tap "Ultra Boost" settings that may include GPU optimizations for higher FPS and reduced micro-stutters. Popular Options to Consider Qualcomm Snapdragon devices