Geological tool for measuring rock orientation, strike & dip, and magnetic field Rocklogger is a geological tool for measuring the orientation of rock outcrops. It uses the phone's compass and orientation sensors to measure dip and dip direction, or dip and strike, in a single click. GPS and magnetic field information can also be saved, along with details on the rock plane & type. Key features:-Log dip & strike or dip & dip direction by placing the phone on the rock/plane in any orientation (using the rotating symbol and quick help features as guides)-Plot logs on a map, with correct dip/strike symbols-Plot poles or planes from logs on a stereonet, and interpret by touching the plot to find trends and intersections (paid only)-Log the ambient magnetic field-Launch the camera to take photos while logging.