The app is okay I guess. What this review is really about is the 85t and call performance. If you are sitting still in a quite room then the call experience is fine. Anything other than that and the person you are talking to may end up complaining about hearing your background noise above your voice. Personally I feel these do not work well for those with lower/deeper (not quiet) voices. I have not found controls to help with that aspect. I ended up returning them to Costco.