CPU Thermometer by Mugich CPU Tools is a free Android application that helps you monitor your device's CPU and battery temperature. The app displays the current temperature of your device's CPU and battery, allowing you to keep an eye on the temperature and avoid overheating.

The app is easy to use and displays the temperature in a clear and concise manner. It is important to note that getting the exact CPU temperature depends on the Linux kernel. The app also doesn't offer any additional features beyond displaying the temperature.

Overall, CPU Thermometer is a useful tool for monitoring your device's temperature, especially if you're worried about overheating. However, it doesn't offer any additional features beyond temperature monitoring. If you're looking for more advanced features, you may want to consider upgrading to the PRO version.