Rather than be limited by large data loggers or laptop computers, UltraGPR has always relied on handheld data recording devices.  Groundradar has recently developed an Android app to control the UltraGPR, record data from UltraGPR, Differential GPR (or RTK), and additional sensors.  The app runs on a custom waterproof and shockproof datalogger which easily fits into a pocket.  The software was specifically designed for ease of use, and relies on spoken voice prompts and warnings to allow completely hands-free use during surveying.  The datalogger also has the ability to capture DGPS-tagged photographs.  As before, the datalogger is entirely wireless, using Bluetooth and WiFi communication with the GPS and radar.