About those phone apps that display property lines...
Popular apps that display property lines include LandGlide, OnX, Regrid and various others. All they do is display a copy of the parcel line data maintain by the counties. If the county parcel line data is bad then the same bad data is displayed by these apps.
The pic below shows a map I recently made for client using the surveyed description on the client’s deed. The black lines show the parcel line data from the county GIS server.
If this property owner was using a cell phone app instead of a custom map then they would never find their corner stakes.
