It is based on the call log to different statistics. Show listings sorted by minute contacts / out, no calls to exit / entry, dropped calls and missed calls. You can also see a horizontal bar graph comparing the minutes of exit / entry, etc.
There is version 3, called Record Calls 3 that adapts better to different types of screens.
Tags: registro llamadas , registro de llamadas en , historial de llamadas , registro de llamadas , historial llamadas , widget registro llamadas , ver historial de llamadas