#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 2.0.4

Feature improvements
Please download the latest desktop apps from our website for the best experience
Mac v2.0.1.5 -
Windows v1.5.2.2 -

Ratings and Reviews

4.1 out of 5
1K Ratings
1K Ratings

Windows 10 user, almost perfect implementation

Thought I'd provide a positive review to allow people considering this app an alternative experience to all the negative reviews recently posted..
Its been three days and I'd give the app 4.5 stars if I could.. it works ALMOST as advertised for me, the only thing that does not live up to claims the Devs make is the "lag free" feature, which is not technically true. I can definately see the lag when moving window around or in a spreadsheet, this lag is NOT really a functional problem but it is perceptible.
All in all, I don't regret my purchase regardless of this minor issue, as it still works almost perfectly, and considering this is all achieved over USB is impressive.
It works be good if the Devs could develop advance drivers that utilise my powerful dedicated graphics card in my laptop.. or even options to use the thunderbolt port for greater data transfer bandwidth

Used on iPad pro 9.7 and 2018 Dell xps 15 i7


So close to perfect

I love this so close to perfect. Had some minor issues with the server app. Both Mac and Windows it won't let me set the resolution to match the iPhone 4/4s. This seems to be causing some display issues when using them. I'd also really like the windows and Mac editions to have the same user experience and options. The only other thing I can think of is support for more than one device at a time and to be able to use it over wifi. I know you went sub to avoid the issues of competitors but it would be nice as an option.


Causes crashes on PC, non-refundable

Having the app installed is causing crashes to occur whenever I try to run games developed by Paradox (seems to have something to do with using Intel integrated graphics). When I tried to get a refund on the app one day later, I was told the app is “ineligible for refunds”.

This experience has undermined my confidence in casually buying apps in future.

I can’t give this app anything more than one star if having it installed in any capacity (not just when it’s running, and not just when it runs on startup - the only way I stopped the crashes was by removing the app completely) on my PC is causing crashes.


Duet, Inc.
53 MB
Requires iOS 8.0 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 $37.99
  2. Duet Air (Annual) $29.49
  3. Duet Pro $5.49


  • Family Sharing

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

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