spacedesk is a free app that lets you use an Android tablet as a second display for your Windows PC. Learn how to set up and use it.

First, you need a compatible tablet running Android 3.01 or newer (or a smartphone running Android 2.2 or newer) and Windows XP (32-bit) or Windows 7 (32 or 64-bit).

If you're looking for an Android tablet to use this guide on, our old collection of the best Android tablets from almost a year ago still holds up pretty well. Ten inch tablets are typically ...