Patients who receive smartphone-assisted health coaching will have a significantly lower 24 hour ambulatory blood pressure mean than patients who receive just health coaching

Primary Outcome Measure: Mean 24 hour ambulatory blood pressure

Secondary Outcome Measures: Profile of Mood States-SF Vigor Scale; Satisfaction with Life Scale; Positive and Negative Affect Schedule; Hospital Anxiety and Depression Scale; SF - 12

Inclusion Criteria:

• 25 - 70 years old;
• mean daytime systolic BP> 130 mm. Hg.

Exclusion Criteria:

• Severe or end-stage organ disease (liver, kidney, heart, lung) or history of diabetic ketoacidosis, or any other illness with expected survival less than 1 year;
• severe cognitive impairment;
• diagnosed psychiatric illness or disability;
• clinical significant cardiac arrhythmia;
• symptomatic orthostatic hypertension;
• pregnancy;
• not fluent in english.