Photo Watch lets you send a photo from your iPhone
right to your Pebble, to use it as a watchface background.
Just shoot or pick an existing photo from the companion iPhone app, choose which portion of it will fit on your watch, choose the two-colors theme then tap on 'Send to Pebble': it's that simple!
And don't worry: your photo will still look gorgeous in black and white as well as with any of the other two-colors themes, since Photo Watch automatically applies a well-known dithering filter that reminds of the 80s.
NOTE: Of course, only the B&W theme is available on the original Pebble.
TO YOUR PEBBLE
Since Photo Watch stores the photo directly on the Pebble, it will work even without a connection to your phone once you have sent the photo in the first place. Of course, you'll need the connection again every time you'll want to change the photo.