The app is difficult to use, especially for those of us who have never been able to see color. I contacted the developers concerning a tutorial, if one exists. Not only have I not receive a response, but now I can't get the app to even open. Furthermore, I tried again to contact the developer, I was alerted that the Support page--which I needed--is currently off line. Is this just another case of an app that would increase the independence of a fairly small but growing number of people, has been forever put out of service?