Sketch Mirror is described as 'Please note: this is a companion to Sketch for Mac, and requires it to function' and is an app in the Development category. There are five alternatives to Sketch Mirror for a variety of platforms, including Android, iPhone, Android Tablet, iPad and Windows. The best alternative is Lunacy, which is free. Other great apps like Sketch Mirror are Framer Preview (Free), Design Mirror (Paid), Figma Mirror (Free) and Adobe XD Mirror (Free Personal).
Lunacy is a native Windows app that opens, edits, and stores .sketch files. In short, it’s long-awaited Sketch for Windows. It solves the big pain of design teams working on different operating systems and improves the process of transition from design to development.