#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 2.2.2

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

Ratings and Reviews

4.3 out of 5
791 Ratings

791 Ratings

troublea ,

Good but.....

It seems to be that this app using real-time streaming - it encode your screen in the Mac or PC and your iOS device does real-time video decode. That means u need a really fast cpu for your computer and a decent newer iOS device. So, if u are using a two core cpu computer or a really old iPad , don’t bother buying his App. Everything will be slow and u will ask for a refund.

But if u have a top of the line computer and anewer iPad, go ahead. This app is the best in the market.

looooookout ,

It cause

I have to say this is very amazing function I could imagine. I tried it with pdf viewer, office, browser and photoshop etc. It works great, for the first time.

The days after, I try to use it as second display for my paper writing, then I noticed a little lag on the iPad. Slightly, but annoying. More than that, my photoshop and the other adobe softwares stops working. Which is the very major things I wanna do it on iPad. It always crashes during startup, even it do running well, I can’t open any files on it.

Turns out the duet software for PC was responsible for it, uninstall duet on PC, everything backs on track, and this app just become totally useless.

my1010 ,


To be honest, I want to give 5 stars to this software after my first attempt to run on my computer. Now I and my little daughter can use my new iPad Pro to draw a picture using our fingers in free.

However if you want to create something in details, you must upgrade to pro version and use the Apple Pencil. That upgrade cost us$20. A little bit expensive.

Lower the price, I will strongly recommend this software to everybody.


Duet, Inc.
55.1 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.
HK$ 78.00
In-App Purchases
  1. Duet Pro HK$ 233.00
  2. Duet Pro HK$ 33.00
  3. Duet Air (Monthly) HK$ 15.00


  • Family Sharing

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

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