A free program for Android, by System monitor tools lab – Cpu Ram Battery.

CPU Monitor – temperature usage performance is an application for monitoring the temperature of your device’s CPU, and the frequency of the CPU available to your device. It is designed to look beautiful, so you will not need to sacrifice any functionality for aesthetics.

You can set the widget to monitor the CPU temperature and frequency on your Android device.

If you want to use the application, you must set the permissions for the application to work correctly.

Get this utility app on Google Play Store.