Sketch Mirror, the app that let's you mirror the contents from Sketch (Mac) is iOS only, so in that sense you're limited to Apple devices. However, you can use

Sketch Mirror, the app that let's you mirror the contents from Sketch (Mac) is iOS only, so in that sense you're limited to Apple devices. However, you can use Sketch to design anything from apps (desktop, mobile, web), websites to PDFs to PPT presentations.