The usage screen is really cool. It shows you what data, local and international minutes you have used (including any boosters), all in the app, all in real time. You can also check this months, last months and total usage, as well as data and voice roaming.

On the usage screen the 'Current Month' shows what you have used from the day your plan got renewed until this moment, 'Last Month' shows your usage for the last month and 'All Time' shows your total usage since joining us.