We support desktops, notebooks (aka laptops), cellular equipment that support full html, netbooks, pads (ie iPad, Google Nexus) that are running Windows, OSX (ie Lion, Snow Leapord), Android.
Note: When using a pad (ie iPad, Google Nexus or another) and cellular phones the drawing tool works best if you have a thin Stylus (design looks like a pen that is safe to use on touch screens), because otherwise the tips of a person's finger may not allow for accuracy for the borders.
Otherwise, if you do not need accuracy for the borders then you will be fine.
Note: We do not support Linux.