How to use your cell phone as a second screen for your PC or laptop

If you work with many windows open, multitask, or simply want to increase your productivity without buying another monitor , there is a practical and affordable solution: using your cell phone as a second screen for your PC or laptop .

Thanks to tools available on Windows, macOS, and Android, it's now possible to extend or mirror your computer's content onto your phone screen. This allows you, for example, to follow a video call while taking notes, control music without interrupting your work, or consult supporting documents.

Below, we explain how this tool works , what you need, and the best apps to achieve it without complications.

Having a second screen, even a small one like your cell phone, can significantly improve your workflow. Some of its advantages include:

• Monitor secondary tasks , such as email or networking, while working in another application.
• Control music, presentations, or recordings without leaving the home screen.
• Take notes or consult documents without having to minimize anything.
• Use creative tools like video or code editors with separate previews.

All of this is especially useful for people who work from home, students, content creators, or users who travel and don't have access to an additional screen.

The process varies depending on your PC or laptop's operating system, but in general you'll need:

• A computer with updated Windows 10/11 or macOS
• An Android phone (or iPhone, depending on the method chosen)
• Shared WiFi connection (both devices must be on the same network)
• An app or software compatible on both devices

Although some options allow for wired connection, the most common option is Wi-Fi, as it facilitates mobility.

Below are some of the most commonly used tools to achieve this function:

One of the most popular options. Easily transform your Android into an extra monitor.

• Install the server software on your PC from spacedesk.net
• Download the app on your phone from Google Play
• Make sure you are both on the same WiFi network.
• Log in and select the PC from your mobile phone

Advantage: No cables required, runs smoothly, and auto-detects resolution.

Originally designed for iPad, now compatible with Android and PC.

• Download from duetdisplay.com
• It can work by cable or WiFi
• Allows you to adjust resolution, latency and display mode

Ideal for professionals who need stability and cross-platform compatibility.

Older but functional alternatives, especially for wired connections if WiFi is unreliable.

It allows you to turn your phone into a display without mirroring the entire interface, but it requires more configuration.

• Use a 5GHz Wi-Fi network to avoid interference and achieve greater fluidity.
• Adjust your phone's brightness and resolution for greater comfort.
• Turn off battery saving mode on your phone to avoid power outages.
• If you are using a wired connection, make sure you have updated drivers .

Some apps allow you to define whether you want to use your phone as an extended screen (more space) or as a mirror of your main screen (duplicate) . The former is more useful for productivity.

While both devices work, a tablet typically has a larger screen, making it more convenient as a second display. However, a cell phone can perfectly serve functions such as:

• Display a spreadsheet
• Controlling slides in a presentation
• Monitor social networks or work chats
• Play informative content (PDFs, notes, maps)

The choice will depend on your needs and the screen size you have available.

Turning your phone into a second screen is an affordable and functional way to work better with what you already have. All you need is a stable connection and the right app to transform your desktop, improve your organization, and make the most of your digital space.