Inclusion Criteria:  ≥18 years old Presenting for acute care at UMass University and Memorial hospitals, including EDs, inpatient medical units, or inpatient behavioral health units for opioid addiction related health complaints, including opioid overdose, opioid related medical consequences, opioid intoxication or withdrawal syndromes, and/or seeking help for OUD Presence of a current DSM-V opioid use disorder (OUD), mild to severe Medically appropriate for outpatient Suboxone treatment, as judged by the treating clinician and behavioral health consultant or toxicologist working with the patient clinically  Exclusion Criteria:  Persistent altered mental status (not alert, not oriented, psychotic). Not interested or willing to participate in Suboxone treatment Best referral site is NOT one of the study's partner clinics in the central MA region, which will be outpatient MAT clinics and primary care within the UMass system and the three other primary facilities outside of the UMass system. Unwilling to use the OARSCM app (if assigned) Does not have access to their own smartphone with at least iOS 7.1 or Android 4.2, the minimal technology required to run the app, or not willing to access clinic-dedicated computer to access the program Currently in state custody or pending legal action that might lead to imprisonment Cannot paraphrase the study requirements Does not read or speak English Does not reside in the central MA region Already enrolled in the trial