I just wanted to let you guys know that the app that I was working on has been approved by Apple on the App Store https://itunes.apple.com/ca/app/instasgraph/id1013984205?mt=8
... It currently graphs one signal from an analog input on your RFDuinos... I'm working on making it universal (for more than just RFDuino), increasing (if possible) the number of signals to be graphed, adding a simulator, as well as creating an android version of it... however I will have to learn Android development first...
Let me know once again if you're interested in testing new revisions of it.