fyi - phone apps are a definite security risk. it might be ok for some of us very north americans, but using a phone app for less progressive places is not a good idea. nor is taking pics with a phone. might as well scrawl what you are doing on the sidewalk in front of the house.App is no longer offered sadly closed that down year or so ago now.
i worked with larger ops for a few years. we were never allowed to even bring cells into a production area.