A collaborative whiteboard: freehand ink, shapes, text and sticky notes on an infinite canvas with pan and zoom, live presence and cursors for everyone on the same board through server-sent events, undo per user, export to SVG and PNG, and boards shared by URL with an optional edit password. It must feel instant on a laptop and work with a finger on a phone.
A collaborative whiteboard: freehand ink, shapes, text and sticky notes on an infinite canvas with pan and zoom, live presence and cursors for everyone on the same board through server-sent events, undo per user, export to SVG and PNG, and boards shared by URL with an optional edit password. It must feel instant on a laptop and work with a finger on a phone.