I guess I'm really spoiled with my phone right now (a first)... Because I'm responding from it, no app necessary.
It's an Android, and the things it will do continually amaze me. I have CC wherever I go.
Off-topic, but my discovery for the day: I just added a Nook app that just turned my phone into a book reader. On top of already being a phone, PDA, email thingy, camera, radio, social networker, internet browser, Angry Birds player, and the all-important CC link. I'm happy as a clam with this thing even though technology left me behind in about 1997.
Just thought ya might like to know an app isn't necessary for an Android phone. I might be totally unqualified to say that, though, because I still don't even understand the difference between wi-fi and 3G networks. Or why I'd want to create a hotspot in the first place...?