Table 1.

Themes and codes derived from qualitative analysis of Calci-app mobile focus group interviews.

Theme	Codes
Good aesthetics and ease of use promoted app usage	Easy to pick up and use Preferred dietary assessment method Attractive design
Frustration and time consumption reduced app usage	Slow loading Unintuitive search function No directive interface Lack of database categorization
Ability to add accurate entries may improve app usage	Inaccurate search function Portion size cannot be estimated Portion size entry not simple and flexible Lack of extensive database with basic options
Owning a purpose motivated app usage	Knowing calcium level in food influences choices Want comparison between actual and target intake Potential for app to provide health education Want to see trend of past entries Possible data sharing with health professionals
Diet concerns hindered app usage	App usage heightened dietary awareness Concerns about diet may lead to eating disorders