Sign Shaker uses randomly generated signs from Signspotting. It is a fortune-telling app in the spirit of a fortune cookie or any other fortune-telling device (i.e. it has no scientific basis and is meant purely as entertainment). Visit the website at www.signspotting.com to view more signs, submit your own, or purchase any of the Signspotting books. Signspotting is a protected trademark and holds the rights to all the images in this app.