You can store your downloads in your account when you signup!
A black iPad lays on a wooden table next to small notecards with Japanese characters. On the top left corner some dark leaves peek out, and on the top right smooth river stones decorate the scene. The iPad is in landscape mode and will hold a 1024x768px mockup. This is perfect for a language learning app or calligraphy app.
Drag & drop not supported, but you can still upload via this input field: