Tried out this app called "Elixir" & found it amazingly nice & useful.
Here is the official description:
Do you want to know everything about your device? Try Elixir and its widgets!
Elixir is a system information application with highly configurable widgets. Displays information about battery, cpu usage, memory usage, internal and external storage (sd-card), display, wifi, mobile network, location services (gps), bluetooth, sync, airplane mode, sensors, etc.