You can store your downloads in your account when you signup!
For the post-workout cool down you can show off your app in this iPhone 6 mockup. A bearded man chills on a bench after he has finished his crossfit workout. A bright orange kettle ball lays on the ground in front of him. The iPhone 6 is in portrait view and holds an image of 750x1080px.
Drag & drop not supported, but you can still upload via this input field: