Mobile Health Delivered Lifestyle Intervention Program in Patients With NASH

Inclusion Criteria: * Adults age \>18 years * NASH defined as: * Liver biopsy with evidence of steatohepatitis (NAS \>=4) or; * Imaging study (e.g., ultrasound, CT, MRI) with hepatic steatosis and one of the following: * Fibroscan kPa \>8.2 or; * FAST \> 0.35 or; * FIB-4 \>= 1.45 or; * Possession of a smartphone Exclusion Criteria: * Active or recent (\<90 days) participation in lifestyle intervention program, including weight-loss program * Active weight-loss supplement use * Cirrhosis * Inability to provide informed consent * Institutionalized/prisoner * Other chronic liver disease (e.g., viral hepatitis) * Recent Noom use (\<180 days) * Secondary cause of hepatic steatosis, including significant alcohol consumption (men \>30g/d, women \>20g/d) * Severe medical comorbidities/psychiatric illness at the discretion of the study PI