Mindfulness App Training for Cardiovascular Health

Inclusion Criteria: * Age 45 years or older * Fluent in English and proficient in reading English * Living in the Pittsburgh area for the next 5 months and available for study visits and activities during this period * High perceived stress (greater than or equal to 14 on the 10-item Perceived Stress Scale) * Diagnosed with hypertension by medical provider and, if medicated, blood pressure below 150/100, or if unmedicated, clinic blood pressure reading greater than or equal to 125/75 and less than 150/100 * Moderate-to-high cardiovascular disease risk, as indicated by hypertension and at least 1 of the following: * Diagnosed with diabetes by medical provider * Diagnosed with high cholesterol by medical provider * Current smoker by self-report (smoking or vaping every day or nearly every day) * Body Mass Index ≥30 * Android or iOS smartphone that meets study requirements * Participant otherwise able to meet study requirements Exclusion Criteria: * Clinical or symptomatic atherosclerotic disease, including ischemic heart disease, heart failure, angina, stroke, or atrial fibrillation * Two or more "night shift" episodes in the past month * Pregnancy * Typical alcohol consumption ≥15 drinks per week * Marijuana or hashish use \>9 of the past 30 days * Use of other controlled substances (e.g., cocaine, crack, heroin, meth, ecstasy) in the past 30 days * Current moderate-to-severe depressive symptoms (score ≥15 on PHQ-9) * Suicidal ideation (PHQ-9 item 9 score \>0) * Po…