Delphy is a mobile platform for prediction markets built on Ethereum as a DApp. In fact, it is a light Ethereum client running on mobile devices. Its born decentralization ensures that prediction markets are hard to manipulate or shut down, and there is no need to trust one single entity.
Credo is the token you earn when someone you don’t know sends you an unsolicited email. You can use the Credo you earn to send your own emails to people you don’t know, trade it for other currencies, or hold onto it as its power increases.