Pulse is a new camera accessory that allows you to control things wirelessly using a smartphone. It plugs into your DSLR or mirrorless camera's USB port, allowing you to shoot photos, time-lapses, or videos from an app on your phone.
"Any sufficiently advanced technology is indistinguishable from magic." That's the quote by science fiction author Arthur C. Clarke that you'll find on Cardiio's homepage. It's a quote that is quite appropriate, given what the app can do.
The app is a touch-free heart rate monitor that can accurately tell you your pulse by simply looking at your face through your phone's camera.