A bi-directional interface system that facilitates exchange of personal health information (“PHI”) between a mobile device and an electronic health record (“EHR”) system and/or other ancillary systems without storing information on the mobile device. The system may display data that exists in the EHR and/or other ancillary systems valuably viewed at a glance (e.g., vital signs, weight, last void data), as well as facilitate data entry that would feed into the EHR (e.g., vital signs and intake and output). The system may customize at a unit level and/or professional role the information available to health care professionals at the critical time of handoffs and reduce the health care professional's individual need to rely on memory or handwritten notes, further reducing missed information or erroneous information opportunities. The system may provide a mobile application to view and enter patient data to reduce potentially delayed information and treatments of care.