SystemMonitor

When first launched will show a green dot in the task tray which can be right clicked for options or double clicked to open a details chart.

Chart will be prepopulated with an estimated and averaged usage since last restart / adapter reset. History will become more accurate the longer the application is allowed to run and gather granular network ussage.

A checkbox is available on the settings screen and on the context menu to auto start with windows for the most accurate usage history.