Inclusion Criteria:  are ≥18 years of age; are undergoing inpatient elective noncardiac surgery with an expected length of hospital stay ≤3 days after surgery; and provide informed consent to participate.  Exclusion Criteria:  are unable to communicate with research staff, complete study surveys, or undertake an interview using a tablet computer due to a language barrier or a cognitive, visual, or hearing impairment; or reside in an area without cellular network coverage.