#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 2.2.6

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
Stability fixes

Latest Versions
Mac: v2.3.1.3+

Ratings and Reviews

4.3 out of 5
414 Ratings

414 Ratings

Łukasz Markiewicz ,

Avoid this like the plague

Worst experience I ever had with any app from the App Store.

For this to work, you need to have it on your iPad and you Mac or Windows PC. Worked fine on Mac, but recently I use my PC more often so I installed the latest version and couldn’t log into Windows afterwards. Hard crash, blue screen, 100% of the time. Apparently this is a frequent enough problem that when I searched for the blue screen error Duet Display was near the top of the list of possible culprits.

Uninstalling it was a massive pain, though it is more an issue with Windows 10. Still, couldn’t remove it in safe mode without modifying the registry which is always a fun way to spend an hour of your Saturday evening.

Once it was purged, my PC returned to working flawlessly.

Worst piece of software I have ever used. I remember running into a computer virus on my parents’ PC back in XP days and it was a more pleasant experience than using this pile of junk.

This stuff can sometimes happen even to the best software devs when the system update bricks your app. But when you google and get results with people having the same problem in 2017, 2018 and 2019 then the people responsible for the Windows version should really consider a career change. Problems can happen, but persistent problems are unforgivable.

Avoid, avoid, avoid.

I wish I could have my money back.

Developer Response ,

Please contact our support and we'll provide a solution for you. We need your setup's information in order to completely fix it, the work on our display driver is continuous.

Szwagier ,

Works great, but be aware...

Picture is sharp and smooth and the team behind this great app is very supportive in case of any issue, but keep in mind it’s not a substitute for an external monitor - when working on static screen (editing doc, etc.) Duet uses around 20% of your CPU. But when watching a video or working in just a bit more vivid UI environment (eg. Ableton Live), the CPU usage goes above 80% by Duet itself! So forget about watching a video without the huge noise of your computer's fans in the background.

J.Utri ,

Good but not flawless

The app works overall pretty well, there’s no problems with connecting the iPad to the computer, the lag is small, the touch bar is cool. But the option of resolution 1152x800 does not work (iPad Air 2 and MacBook Pro 15).. so I can choose the smaller resolution, but then the image is not sharp or the bigger one, but then I loose a big part of the screen because there’s a huge black stripe at the bottom of the screen. Also there’s no option of vertical screen which could be nice.

Developer Response ,

We'd be happy to take a closer look at the issue you're experiencing. Please email us at and refer to this review!


Duet, Inc.
55.7 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
47,99 zł
In-App Purchases
  1. Duet Pro (Annual) 142,99 zł
  2. Duet Pro 16,99 zł
  3. Duet Air (Monthly) 8,99 zł


  • Family Sharing

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

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