You can store your downloads in your account when you signup!
This iPhone 6 mockup set on a bar counter will be be perfect place for your screenshots. The bar counter is an beige marble and the iPhone 6 is leaning against an extra slab. The counter has light curves in it that give it a natural look. The background is dimly lit with light highlights. Several bottles of alcoholic beverages rest on shelves in the backdrop. The iPhone 6 mockup holds an image of 780x1334px. This is the perfect place for a social app.
Drag & drop not supported, but you can still upload via this input field: