I got the new I Phone 6s on Friday and set it up as a new user to make sure it was a clean starting point. One of the first apps I put on the phone was KNFB reader. When I take a picture of a document, the app freezes up and the back button does not work. The only way I can get out of it is to close it in the app switcher. Than the next time I try to take a picture it resprings to the home screen. I have no problem running it with I O S 9 with my 5S, so I think it is device specific. Is anyone else having this problem with the 6S or 6S plus?