No account, and your cards never touch our servers. Share a card and nothing is uploaded: the whole card rides inside the link, so it opens in BoomBar on iPhone or Android, or in a plain browser for someone with neither. New: give any card its own colours, carried from your list to your watch to the link you send. And BoomBar won't draw a barcode that lies, where other apps let a UPC encoder pad a number into a symbol for a different one.
