Table 2.

Core themes and subthemes.

Themes		Subthemes
Theme 1: Overall impression		Promotion of healthy behaviors by self-monitoring Accessible and instructional health content Influence on healthy lifestyle adoption of the church Technical difficulties with self-monitoring
Theme 2: Content usefulness
	Education modules: General	Thought-provoking and self-reflective Descriptive on cardiovascular health Easy to comprehend health information
	Education modules: Videos	Engaging presentations Convenient and succinct Effective visual learning
	Education modules: Premodule and postmodule self-assessments	Complementary to video series
	Education modules: Brochure content	Reinforcement and summary tool Time-consuming Technical difficulties with access
	Recipes	Inspired action toward healthy eating Better understanding of benefits of healthy eating
	Sharing board	Motivational to healthy lifestyle change Support network Information exchange between participants
	Testimonials	Preferred heart disease survivors or those making healthy lifestyle changes
	Self-monitoring (diet and physical activity)	Fostered personal accountability toward a healthy lifestyle
Theme 3: App format
	General	Fulfilled expectations for continued engagement Diversity of health care professionals within the education modules
	Attentiveness to nuanced cultural perspectives	Importance of linking faith to health for the African American community Cardiovascular health disparities affecting African Americans Implications of visual representations of African Americans
Theme 4: App implementation
	Facilitators for use	Positive messaging supported engagement Focus on benefits of healthy lifestyle Simple navigation Visual display of education module progress Education module variety of activities appealed to differing learning styles Overview of cardiovascular risk factors at start of education modules Consolidation of cardiovascular health information through mobile technology
	Barriers to use	Cumbersome data entry and log-in process Inability to download app on other personal mobile devices
Theme 5: App impact		Positive changes to dietary patterns Better awareness of long-term benefits and motivation to make healthy lifestyle changes Team-based lifestyle changes among couples and across generations Positive influence on the patient-provider relationship Health promotion within the church congregation
Theme 6: Suggestions for app improvement		Visuals to see progress of diet and physical activity self-monitoring/tracking Automatic syncing function from other diet and physical activity apps Additional functions for education modules and sharing board Individual tailoring of the app to encourage app use and increase its relevance