Connect your tablet as a display using software or hardware
You can use a tablet as a second monitor by running remote desktop software on both devices, which mirrors or extends your computer's screen wirelessly. The tablet displays what your computer is showing, letting you drag windows, spreadsheets, or reference material onto the extra screen. This works over Wi-Fi or USB, depending on the software you choose.
The most common approach is to install an app on your tablet that acts as a receiver, then install matching software on your computer that sends the display. Popular options include Duet Display, Luna Display, and Microsoft's built-in Remote Desktop. Some are free; others charge a one-time fee or monthly subscription.
Hardware solutions exist too—small USB adapters that plug into your computer and broadcast to your tablet—but software is simpler for most home setups because it requires no extra equipment beyond what you already own.
Key Takeaways
- Remote desktop apps like Duet Display and Luna Display turn your tablet into a wireless second monitor by streaming your computer's display.
- Your tablet and computer must be on the same Wi-Fi network, or connected by USB cable, depending on which software you use.
- Installation takes five to ten minutes: read the app on your tablet, read the companion software on your computer, then sign in or pair them.
- Performance depends on your Wi-Fi speed and the app's quality; expect a slight delay on wireless connections, but it is usually unnoticeable for spreadsheets and documents.
- Free options exist (like Microsoft Remote Desktop for Windows), but paid apps often offer faster refresh rates and lower latency for smoother dragging and scrolling.
Choose between wireless and wired connection
Wireless connection is the most convenient option. Your tablet and computer talk over Wi-Fi, so you can place the tablet anywhere in the room without cables. The downside is a slight delay—usually 50 to 200 milliseconds—which you notice most when dragging windows or using the tablet as an input device. For reading documents, spreadsheets, or reference material, the delay is invisible.
Wired connection uses a USB cable between your tablet and computer. This removes the Wi-Fi delay and is faster, but ties your tablet to your desk. Some apps support USB; others do not. Check the software's documentation before you buy.
If your computer is far from your Wi-Fi router or your router is slow, wired connection will feel noticeably smoother. If your setup is already wireless and your internet is stable, wireless is simpler.
Install the software on both devices
Start by choosing your software. Duet Display costs $20 one-time on iOS or Android and works on Windows, Mac, and Linux. Luna Display is $5 per month or $50 one-time and works on Mac and iPad. Microsoft Remote Desktop is free for Windows and Mac computers, and free on iPad and Android tablets, but only works if your computer runs Windows Pro or higher (not Home edition).
read the tablet app first. Open your tablet's app store, search for the software by name, and install it. You will need to create an account or sign in if the software requires it. Do not open the app yet.
Next, go to your computer and read the companion software from the developer's website. Run the installer and follow the setup steps. Most software will ask you to sign in with the same account you used on the tablet. Once both are installed and signed in, open the tablet app. Your computer should appear in a list of available devices. Tap it to connect.
The first connection usually takes 30 seconds to one minute. After that, reconnecting is when ready.
Adjust display settings and resolution
Once connected, your tablet will show your computer's screen. The image may be small or stretched depending on your tablet's size and the software's default settings. Most apps let you zoom in, zoom out, or fit the entire screen to the tablet's display.
Open the software's settings on your tablet. Look for options labeled "Resolution," "Scaling," "Zoom," or "Display Size." If the text is too small to read, increase the zoom. If you want to see more of your computer screen at once, decrease the zoom or lower the resolution.
On your computer, you can extend your display (the tablet becomes a separate screen where you drag windows) or mirror it (the tablet shows exactly what your main monitor shows). Most software defaults to extend mode, which is more useful. You can usually toggle between modes in the computer software's settings.
Troubleshoot connection and performance problems
If the tablet cannot find your computer, make sure both devices are on the same Wi-Fi network. Check your router's name and password on both devices. If they are on different networks—one on 5 GHz and one on 2.4 GHz, for example—they will not see each other. Most routers broadcast both frequencies under the same name; connect both devices to that name.
If the connection is slow or keeps dropping, move your tablet closer to the router or restart your Wi-Fi. Interference from microwaves, cordless phones, or other devices on the 2.4 GHz band can degrade performance. Switching to 5 GHz (if your router supports it) usually helps.
If the display is laggy when you drag windows, try lowering the resolution or refresh rate in the software's settings. Older tablets or computers may not handle high-quality streaming smoothly. Wired connection (USB) will also reduce lag if your software supports it.
If the software crashes or disconnects repeatedly, restart both devices and reinstall the app. Check the developer's website for known issues with your specific tablet model or operating system version.
Use your tablet as an input device
Most remote desktop software lets you use your tablet's touchscreen to control your computer. You can tap, swipe, and pinch just as you would on the tablet itself. This is useful for scrolling through documents or clicking buttons, but the touchscreen is less precise than a mouse for detailed work.
If you want better control, connect a Bluetooth mouse or trackpad to your tablet. The tablet will pass the mouse input to your computer, giving you the precision of a mouse with the convenience of wireless. Some software also supports keyboard input from your tablet's keyboard if you have one.
Keep in mind that using the tablet as an input device adds to the wireless delay. For typing or precise clicking, a mouse or keyboard connected directly to your computer is faster.
Understand performance limits and when this setup works best
A tablet monitor works best for static content: spreadsheets, documents, email, web browsing, and reference material. It is less ideal for video editing, gaming, or any task where you need fast, responsive interaction. The wireless delay and lower refresh rate (compared to a dedicated monitor) make these tasks frustrating.
Older tablets and slower Wi-Fi networks will show more lag. A newer iPad or Android tablet on a strong 5 GHz Wi-Fi connection will feel nearly as responsive as a wired monitor. Budget tablets on 2.4 GHz Wi-Fi may feel noticeably slow.
Battery drain is also a factor. Streaming video to your tablet uses more power than normal use. If you plan to use this setup for hours, keep your tablet plugged in or expect the battery to drop 20 to 30 percent per hour.
Frequently Asked Questions
Can I use any tablet as a monitor?
Most tablets work, but you need the right software for your tablet's operating system. If you have an iPad, Duet Display and Luna Display both work. If you have an Android tablet, Duet Display and Microsoft Remote Desktop both work. Check the software's system requirements before you buy.
Do I need to pay for software or is there a free option?
Microsoft Remote Desktop is free if your Windows computer runs Pro, Enterprise, or Education edition. If you have Windows Home, you will need paid software like Duet Display ($20 one-time) or Luna Display ($5 per month). Mac users can use Luna Display or Duet Display.
Will this work over the internet if my tablet is away from home?
Most software works only on the same Wi-Fi network. Some apps like Microsoft Remote Desktop and Chrome Remote Desktop support remote access over the internet, but you need to set up port forwarding or a VPN, which is more complex. Check your software's documentation for remote access options.
What is the delay like when using the tablet wirelessly?
Typical wireless delay is 50 to 200 milliseconds, which is invisible for reading and scrolling but noticeable when dragging windows or using the tablet as a mouse. If you need zero delay, use a USB cable connection if your software supports it.
Can I use my tablet as a monitor while also using it normally?
No. While the remote desktop app is running and connected, your tablet is displaying your computer's screen. You cannot use the tablet for other tasks at the same time. You can disconnect and use it normally, but you cannot do both simultaneously.