These are specific app icons for the app store ... If you wanted to you can just either draw your icons and let Sketch do the normal (@x1) version. But you will then need to rename the newly created ...

Quickly set up your Sketch file and export screens for the iPhone 4 ... Plus, it is encouraged to edit the final screens to give more individuality. I included an App Icon template that you can use ...

Continuous one line drawing of pieces of jigsaw on white background. Vector illustration for banner, template, poster, backdrop, web, app. Black thin line of puzzle icon. Complete Four Pieces Puzzle ...