Duet Display allows iPad to work as second display for Windows and Mac
An app called Duet Display, created by an ex-Apple engineer, originally could be used by Mac users to connect an iPad as an external display. Now, it allows Windows PCs to use an iPad or iPhone as a second display too. The app is very fluid with minimal lag, and it is already configured so the mouse pointer can be moved between the main machine and the other display, adding a lot of functionality.
The developer believes that those making use of this app will be up to 48% more productive just by adding to the amount of screen space. The app is easy to set up, and the only connection needed is between the iPad and computer itself with the lightening cable, and instantly it transforms into a monitor, charging the second device as well. Apps and browser tabs can be moved seamlessly between the two displays, and they even automatically change dimensions for the shape and size of the second screen. The touch screen can still be used too, which is really nice for quick clicks.
Overall, Duet Display works very nicely. I have used it with my 2015 MacBook Pro 13 inch without any issues to speak of. The app is usually sold for $13.99, but because PC compatibility has just been added, Duet Display is temporarily 40% off. This is a great alternative to buying a second monitor, and the functionality is basically the same, but at a much cheaper price with more portability.