The screen-sharing app is free for personal use.
Here’s how to set it up.
Install theSpacedesk driver softwarefrom the official website on your Windows 11 PC.

fire up the Spacedesk app on your iPad.
It will automatically detect your Windows PC.
Tap on the connection to view the Windows desktop on the iPad screen.

The Spacedesk driver console appears on your Windows PC when successfully connected.
To view Spacedesk options, right-tap the app’s icon in the Windows notification area and selectSpacedesk Driver Console.
Select and send a specific app to the iPad connected as an extended display with a PC.

Note:
Spacedesk also supports USB tethering with an Apple machine.
Open theSpacedesk Driver Console>Communication Interfaces, then check the box forUSB Cable iOS.
The free version can duplicate the screen on Windows 11 and also extend the display.

However, you must upgrade to Pro to use advanced features like HD screen display.
Go to theLetsViewofficial website and select theDownloadbutton to download the app for Windows.
Then, follow the on-screen instructions to roll out the app.

kick off the LetsView app on both your Windows PC and your iPad.
LetsView automatically detects the connected devices and displays them underMy deviceson the PC and iPad.
SelectShare my screenorExtend my screenfrom the dropdown on top-right of the Windows app.
The General method is the easiest and quickest.
choose the iPad underMy devicesand initiate screen mirroring.
To use a Passkey, tap theScreen Mirroringbutton and enter the number displayed on the iPad app’s screen.
It’s a solid option if you have an older iPad.
Previous app versions are compatible with iOS 7.0, released in September 2013.
Again, you have to set up sibling apps in both Windows 11 or 10 and on the iPad.
fire up the Duet Display app on your iPad and go through the introduction screens.
To start using the app, you must register and select a subscription plan.
Duet Display is a subscription service with a 7-day trial.
UnderMultiple displays, chooseExtend these displays.
Scroll back up, where you should see two rectangles, labeled 1 and 2.
“1” represents your PC monitor, and “2” is your iPad.
Is the iPad a Good Second Monitor?
Windows doesn’t haveSidecar, unlike macOS.
So, you have to depend on third-party software for the pairing.
They can be an extra cost, as most screen mirroring apps with advanced features are paid.
Spacedesk is a viable free app that can take care of everyday uses on a second monitor.
Wireless connectivity and the touch interface are a plus with the app.
Ultimately, it will depend on what you want the second monitor for.
For instance, even the iPad Pro’s 12.9inch screen might not be adequate for spreadsheet or database work.
But having a second monitor when you need it is better than not having one.