Google Play Store
: This app allows you to manually set the number of threads (matching your CPU cores) and run a "stress test".
Best for gamers who want an FPS overlay + core control. Less granular than Smartpack but one-click simple.
: If you are connected via a computer, you can use ADB to push the load: adb shell 'dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null &' .
Even if you were able to achieve this (via rooting or a specific device exploit), forcing all CPU cores to run at maximum frequency 100% of the time is generally a bad idea for the following reasons: