CPUBurn is a free Android application developed by Daniel Roggen that runs busyloops in the background with configurable duty cycling. The app allows you to test thermal throttling and drain the battery. With this app, you can configure the duration of sleep/active periods and the number of threads running. It also provides an option to acquire a PARTIAL_WAKE_LOCK, which keeps the CPU on even when the screen is turned off.

This app is useful for developers and users who want to test the performance of their device. It is easy to use and provides accurate results. The app's interface is simple and straightforward, making it easy to configure the settings. However, it does not provide any information or guidance on how to interpret the results. Overall, CPUBurn is a useful tool for testing the performance of your device and draining the battery.