#1 best-selling iPad app in US, Japan, UK, Germany, and 17 other countries!

Duet turns your iPad or iPhone into the most advanced extra display for your Mac & PC. Developed by a team of ex-Apple engineers, Duet offers unparalleled performance and display quality - all with zero lag.

Be twice as productive by multitasking with two screens. And for those that travel, have a portable way to stay productive.

To get started, plug your iPad into your desktop using your charging cable. The free Duet desktop app will automatically detect your device, and transform it into a high performance touchscreen display.

There’s no need to worry about unreliable Wi-Fi, laggy performance, pixelated screens or managing network passwords.

Interact with Mac & PC like never before, with touch & gestures, including two-finger scrolling, pan and zoom.

And with our latest release, you can even add a touch bar to any iPad with any Mac.

With Duet Pro, you can turn your iPad and Apple Pencil into a professional graphics tablet. We’ve re-engineered our rendering algorithms for ultra-responsive drawing, optimized specifically for designers, illustrators and artists.

Duet Pro also unlocks pressure & tilt sensitivity, hover, palm rejection, and more to seamlessly draw in the most powerful programs for professionals. Get precise control in Photoshop, Corel Painter, Lightroom, ToonBoom, Illustrator, Manga Studio and more. 

TechCrunch - "Feels Like Magic"
TIME - "Getting Work Done Faster and More Efficiently"
The Guardian - "Lag-free"
Forbes - "The simple thing to note is this...Duet Display works."
The Verge - "Glorious Fluidity"
Lifehacker - "It's fast, easy to use, and works great"
Business Insider - "Zero lag and true retina resolution”
Wall Street Journal - “It’s as easy as just plugging it in"

“Awesome! My iPad Pro can be an extra monitor! Cool app”
~CEO of T-Mobile, John Legere

“Very smooth and responsive indeed, plus you could use the touch screen to “click” on screen interfaces!”
~Photographer, Lok Cheung

“Love the ability to use my iPad as a monitor with Duet.”
~Former Chief Evangelist of Apple, Guy Kawasaki

“Just started using this app called Duet… Kinda love it so far.”
~Comedian and Youtube, Phillip DeFranco

“All my mac folks look at the Duet app… GREAT!”
~Actor and Comedian, Sinbad 

"I really like the app, I suppose the biggest compliment I can give is that it's so easy to setup it almost seems like an Apple product.”
~Early Adopter, M. Nightingale

"Amazing solution for me by the way. Works as I was hoping for and actually my main reason for getting an iPad : )”
~Early Adopter, M. Gemzoe

Duet Works With:
All iPhones and iPads with iOS 7.0 and later
All Macs with 10.9 (Mavericks) and later
All PCs with Windows 7 and later

Duet Pro Works With:
All iPad Pros with Apple Pencil
All Macs with 10.9 (Mavericks) and later
All PCs with Windows 8.1 and later (64 bit)

Duet Pro is an optional upgrade for additional features, and price may vary by location. Duet Pro subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. You will not be able to cancel the subscription once activated. Manage Duet Pro in Account Settings after the optional upgrade.

Learn more at
Privacy Policy:

What’s New

Version 2.1.8

New Hardware Acceleration for Mac (requires Mojave 10.14.2)
Adaptive line lead for Pro users - line lead now matches the color and shape of your stroke
New iPad Pro support
Fix for mirroring
Stability fixes
Please download the latest desktop apps from our website for the best experience
Mac v2.0.7.2 -
Windows v1.6.1.5 -

Ratings and Reviews

4.2 out of 5
239 Ratings

239 Ratings

NikCam13 ,

Great App for Productivity Supported by a Hardworking Team

Duet display has been excellent for me as a student and small business owner so far. It allows a seamless transition from working at home on my windows based computer with 3 monitors to my portable setup with my MacBook Pro/IPad and allows me to have more screen realestate without compromising battery life or having a large system to carry around with me.
I recently had an issue with my duet display not functioning and caused me great frustration. However the duet display team contacted back very quickly (truely sticking to their aim of responding within 12 hours) and helping me through the process of repairing/updating the software which had been affected by the new Apple MacOS update.
I don’t write reviews often, but when i do, it is for something i truely believe is doing a great job.
Thank you to Hector who helped me with my predicament and keep up the hard work with making a great app.

If you have any issues, contact their support team. You wont regret it.

samwich69 ,

Best add on for Mac purchased yet

This add on for the Mac is excellent. For $18 I get another screen and it works seemlessly.

Currently I’m using this with an iPad Pro Jumbo and MacBook Pro. The extra display has added an extra dynamic to my work.

I can work with my laptop connected to an external display in clamshell mode and the use the iPad as a second screen. Using the Citrix connect software I use to connect to work means all screens are utilised meaning a much better work experience.

PCP192 ,

Brilliant app to extend the desktop

I’ve been using duet for a while, and although I had some issues in recent months they have all been sorted and the app is now better than ever.
I work on a MacBook Pro and in the office use my iPad as a 3rd screen to keep apps like my calendar in view at all times. On the road it makes a good second screen or even for presentations as a last resort when there’s nothing bigger available!


Duet, Inc.
55.8 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese

Age Rating
Rated 4+
© Duet, Inc.
In-App Purchases
  1. Duet Pro $52.99
  2. Duet Air (Annual) $32.99
  3. Duet Pro $6.49


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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