I have had the same problems as the last reviewer. I cant tell if the problem lies with ReSound, with Apple, or with both. The day before yesterday (October 21), all was working fine. Yesterday, my iOS updated to 9.1. I also noticed that ReSound had updated its App to add more bells and whistles, which look like they will be welcome if they dont mess up what I bought these hearing aids for in the first place- to work with my iPhone. Yesterday and today, the App doesnt work. It says my Linx hearing aids need to be paired with my iPhone (they are) and keeps pushing me to the Demo mode. I don"t want a demonstration of what might be. I want an App that works and is. If this isnt fixed soon (i.e., today), I am going back to my Rexton aids, that I bought at Costco and which were a third the cost of the ReSounds. The Rextons arent as fancy as the ReSounds, but have never let me down.