FlankScreen

Second monitor for Windows

Your spare tablet is a second screen

FlankScreen turns an iPad, Android tablet, phone or old laptop into a wireless second monitor for your Windows PC. Keep a guide, chat or stream on the side while you play — nothing to install on the device.

Coming soon to Steam Windows 10 and 11

A real extra monitor, not a mirror

Windows sees FlankScreen as one more display. Drag any window onto it, just like a second monitor on your desk.

Just a browser

Open a link or scan a QR code on the device. No app to install on the tablet or phone.

Low latency

Hardware video encoding on your PC and a direct connection over your home Wi-Fi. Typically 40–60 ms on home Wi-Fi.

Touch works

Tap to click, drag, long-press for right click, scroll with two fingers. Laptops can use their own mouse and touchpad.

Fits the device

The virtual display picks a resolution that matches the device's screen, so there are no black bars.

Only your devices

A new device has to be approved on the PC with a matching code. The video stream is encrypted.

Light when idle

Nothing is sent while the screen stands still, so it saves Wi-Fi and the device's battery.

How it works

Three steps, about a minute the first time.

1

Start FlankScreen

On first start it installs a signed virtual display driver (Windows asks for administrator rights once).

2

Open the link

Scan the QR code or type the address on your tablet or phone. Both devices must be on the same Wi-Fi.

3

Use it

The device shows the new display. Move windows onto it from your PC.

Requirements

PC

  • Windows 10 or 11, 64-bit
  • A graphics card with a hardware H.264 encoder is recommended (otherwise the processor encodes)
  • Administrator rights once, to install the display driver

Second screen

  • Any device with a modern browser: iPad, iPhone, Android tablet or phone, another laptop
  • The same Wi-Fi or local network as the PC
  • No internet connection needed while you use it

FAQ

What does the display driver do?

To create a second display, Windows needs a display driver. FlankScreen uses the open-source Virtual Display Driver, signed by SignPath Foundation. It runs in user mode, like a regular program, and is removed when you uninstall FlankScreen.

Does it work with iPhone and iPad?

Yes. FlankScreen runs in the browser on iPhone and iPad, so there is nothing to install from the App Store.

Can several devices connect at once?

Yes. They all show the same extra display; its resolution follows the device that connected first.

Does it send my screen to the internet?

No. The picture goes directly from your PC to your device inside your local network. FlankScreen has no accounts and no cloud servers.

Which languages are supported?

English, German, Spanish, Polish and Russian.