Roast my dribbble design!

I have just published my mockup design on Dribbble and am eager for honest feedback. Please give me your review of this design, from color choice to typography.

Also, can it be useful for those looking to develop fitness apps for their businesses? For more information about design, you can check my design here - https://dribbble.com/shots/23867741-Fitness-App-Design-Concept

Your reviews matter here!