Am using an app called e clean to cover work for a customer, this is over 400 locations around northwest
Never used any other this is first 1 I have used, it has all jobs with there post codes in, it also has gps locations so that u have to be within a near distance to the job to be able to sign it off. Once signed off, the document is there with a map of the area were the phone gps signal went from.
Pretty good especially for me as paper work is a nightmare