If you are a software developer and don’t have an own dedicated design department you sometimes have to create these fancy product images by your own. Your Photoshop skills are as weak as mine? No problem, Placeit can do that for you. Just upload your screenshots to them and select an image from their library where they should put it in. That’s it. You can download a small free version of the generated image afterwards or purchase a large one for advertisement purposes.
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