Hughes Gen4 Needs a Daily by Month Use Graph

I only had the low allowance problem this month, and wanted to see when it happened.many months we leave 4+ Gbs on the table.
When I was sold Hughes Gen4 the rep said there was roll-over of unused allowance.Too bad that didn't happen.

What is the Linux dwnload meter ? is it in the synaptic repository? I won't dwnload anything not in the software manager or package manager.