This is Netstat 1.1.0.
This app displays the traffic amounted on the wifi, wan and bluetooth interfaces
during the current month (or current period, see below).
The day when the accounting period restarts can be tuned. Counters will be reset
to zero on that day. The default is to reset counters on the 1st of every month.
If your accounting period starts on 29th - 31th of a month, set it to 1.
You may also reset counters manually on the preferences screen. Be careful however,
traffic data cannot be restored after a reset.