Select app style and theme

[tefreeman]

• Look at the styles and designs of competitors
• Make sure it's easy to read in different environments.
• Study physiological factors
• Style should be familiar to users on both smartphone operating systems.
• Make sure to research IOS, Android style guides (and Ionic default styles).
• Colors should be attached to certain types of actions (danger action, good action, neutral action, etc...)

[tefreeman]

• Food competitors design mainly use a monochromatic red colored app.
• A small minority use orange.
• Healthy food apps mainly use green.
• Health apps use lots of blue
• Bodybuilding and exercise apps (non-weight loss) use lots of dark colors

[tefreeman]

Bold bright colored Iconography with a minimalistic background. https://envato.com/blog/8-color-scheme-trends-mobile-app-design/