Resource Monitor Mini is a free utility tool available on the Android platform. Developed by KF Software House, it monitors the available memory and CPU loading of your device. The app remains visible on the corner of your phone screen, allowing you to keep an eye on the device's performance.

Resource Monitor Mini lets you customize the color and transparency of the overlay, which can be set to any corner of the screen. However, it is important to note that CPU loading is an estimation for newer devices.

Overall, Resource Monitor Mini is a useful tool for those who want to keep track of their device's performance. It is easy to use and provides relevant information. The Pro version is also available on the Google Play Store, offering additional features.