I'm happy to report that the new Daily Challenge Server is up and running, and my initial testing is going very well. Soon (within the next week or two), CryptoQuote for iPhone, iPod touch, and iPad will be updated to version 2.4. This version is designed to use the new server.
Once I'm happy with the iOS update running "in the wild," Android apps will be next.
So, in a few weeks, CryptoQuote for Android will be updated to version 2.0, adding the Daily Challenge feature for Android users, including Kindle Fire, NOOKcolor, and NOOKtablet.