Mobile App for Post-Op Rehab after Hip and Knee Surgery

Inclusion Criteria: * Provision of signed and dated informed consent form * Stated willingness to comply with all study procedures and availability for the duration of the study * English reading/speaking * Are status post low-energy hip fracture, total knee/hip arthroplasty, or single to multilevel spinal fusion without paralysis * Must be able bodied enough to participate in a mobile app tool for physical therapy * Agreement to adhere to Lifestyle Considerations (see section 5.3) throughout study duration\] Exclusion Criteria: * Severe cognitive impairment: Not alert and oriented to person, place, time, and reason for being the hospital; and unable to follow 2 step commands * Severe physical impairment: * Neurologic paralysis * Polytraumas with restrictions incompatible with anti-gravity exercises * Knee immobilization, bed rest * Unstable medical conditions: * On ventilatory support * Utilizing high degrees of oxygen support (continuous BiPAP, high flow nasal cannula, nonrebreather mask, aerosol mask \>3L/min) * Hemodynamic instability requiring pressor medication support (can include those on pressors for elevated mean arterial pressure goals (MAPs)) * Neurologically instable with strokes, hemorrhages, increased intracranial pressures * Open wounds or surgical incisions * Tenuous closed wounds requiring immobilization or bending restrictions * Open wounds that are either packed/dressed or dressed with a wound vacuum * Surgical wounds that are draining fluid or purulence * Vulnerable populations * Incarcerated individuals * Patients without access to a mobile phone with iOS capability