QCAD is not available for Android but there are a few alternatives with similar functionality. The best Android alternative is Autodesk AutoCAD. It's not free, so if you're looking for a free alternative, you could try AutoCAD 360. If that doesn't suit you, our users have ranked more than 50 alternatives to QCAD and three of them are available for Android so hopefully you can find a suitable replacement.
AutoCAD is a leading CAD (computer-aided design) software used professionally throughout architectural, electrical, mechanical and other engineering and design industries. It was once available under a perpetual license but is now accessed solely through a subscription.
AutoQ3D CAD is a full 2D and 3D CAD application that allows you to create, edit and share your drawings and designs. It is intended for everybody as professionals, sketchers, architects, engineers, designers, students and more.