Do I actually have the experience necessary to judge this? Well obviously I think so. I know what a phone is. I have used cell phones before. I have used cell phone apps before. I have developed cell phone apps before. I thought this was enough. I did, however, for my sake and the sake of the reader, point out my own status in case I'm being stupid (which is a strong possibility, particularly since I can't actually try the app out for myself, and the article may be (was?) misleading).