appkit – Free App Store & Google Play screenshot generator in seconds

Summary: appkit is a browser-based tool that generates correctly sized screenshots for App Store and Google Play submissions. It streamlines the process by letting users upload images, customize backgrounds, captions, and device mockups, then download all required sizes as a ZIP file without login or watermarks.

What it does

Users upload app screenshots, select backgrounds, captions, and device frames, then download eight standardized screenshot sizes for both App Store and Google Play. The tool operates entirely in the browser with no image uploads to servers.

Who it's for

Developers publishing apps on the App Store or Google Play who need compliant, multi-size screenshots without design expertise.

Why it matters

It addresses the common issue of design guideline violations by simplifying the creation of correctly sized screenshots, reducing app rejection risks.