It is an Adobe Air application and there is a version for the web, desktop and ipad.
This would make a really nice addition to the Playbook and Cascades in the future,
jump on the bandwagon and email the author requesting a Playbook port.
if you are looking for a bar charting app then i have made the one and only one available for the BB PlayBook (for a nominal price of 1.99$!). Look in my sig below. If you are looking for pie charts then there are plenty on appworld for free