Trying to document applications you’ve created, or share instructions with your app users? I just discovered this simple device mock-up tool that may help you showcase your apps in different device types. (Just upload screenshots of your apps from your browser or from different devices): https://app-mockup.com
Oh! I should have seen this post earlier. I saw a site called " https://threed.io/ " it gives 3D like mock up and you can play around with the perspectives. But it has only one type of mobile for the time being.