You can store your downloads in your account when you signup!
Simple, straightforward, yet warm is what you get with this lovely Nexus 7 mockup. No distractions, just a black Nexus 7 mockup to display your app on a brown wooden desktop. The table top would be a great setting for a back to school type app for students or teachers. Fitting a nice sized image in 1200x1920px the Nexus 7 gives a broad display.
Drag & drop not supported, but you can still upload via this input field: