Instant iPhone X Mockup is a open source tool for making iPhone X mockup fast. Just drag and drop the image to the iPhone frame and it will be wrapped into the phone screen. (No uploading and loading.)
MockUPhone is the app that allows you to put your design on an iPhone, iPad, Android phone or a TV screen and see how it looks. It simplifies the work of many developers, designers, consultants and project managers, so they can make a wonderful presentation of their product with the PNG files provided.