Best System Monitor app on the market.

iActivity Monitor provides all possible information about your device.
The application is so optimized that it does not consume RAM and CPU time more than applications running in background.

It shows the most precise data The most enhanced application shows following information:
CPU, RAM and Disk usage
Running Processes with a very detailed information
Battery level and estimated work time
Wi-Fi, Edge/3g/LTE traffic, IP and MAC addresses, Carrier information

General Information about device.

This is universal application.