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iOS 3 can’t install from Safari. You can still download the IPA file, but you’re on your own after that.
Duet Display
 This app is designed for both iPhone and iPad
  • Price
    Free
  • CategoryProductivity
  • First releasedDecember 18, 2014
  • Versions16 archived
  • Installable8 of 16
  • AvailabilityStill on the App Store
  • SellerRahul Dewan

RequirementsCompatible with iPhone, iPod touch, and iPad. Requires iOS 5.0 or later.

Customer Ratings

As of December 12, 2024
     
45,385 Ratings

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#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.

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

— INCREDIBLY SIMPLE — 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.

— TOUCHSCREEN — 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.

— PERFECT FOR APPLE PENCIL — 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.

— PRESS — 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"

— REVIEWS — “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 http://www.duetdisplay.com Terms: https://www.duetdisplay.com/help-center/duet-terms-and-conditions Privacy Policy: https://www.duetdisplay.com/help-center/duet-privacy-policy

Sort by Date
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To install apps directly onto this device, it must be jailbroken with AppSync installed.
0.3.3 (10)
Requires iOS 5.1.1+
December 18, 2014
48.3 MB Install Download 1 more copy ›
duet_0.3.3_ios_5.1.1.ipa · 49.7 MB Install Download
1.1.0 (4)
Requires iOS 7.0+
May 12, 2015
5.0 MB Install Download
1.2.0 (12)
Requires iOS 8.0+
December 9, 2015
5.0 MB Install Download
1.3.5 (2)
Requires iOS 8.0+
November 8, 2016
11.4 MB Install Download
1.4.3 (2)
Requires iOS 8.0+
July 5, 2017
21.8 MB Install Download
1.5.3 (4)
Requires iOS 8.0+
25.3 MB Encrypted Install Download
2.0.0 (2.0.0.38)
Requires iOS 8.0+
27.4 MB Install Download
2.2.4 (2.2.4.2)
Requires iOS 10.0+
36.1 MB Encrypted Install Download
2.2.5 (2.2.5.9)
Requires iOS 10.0+
36.2 MB Encrypted Install Download
2.2.6 (2.2.6.7)
Requires iOS 10.0+
36.2 MB Encrypted Install Download
2.2.7 (2.2.7.8)
Requires iOS 10.0+
36.2 MB Encrypted Install Download
2.16.0 (2.16.0.0)
Requires iOS 12.0+
No file in the archive for this version
Download
2.22.0 (2.22.0.1)
Requires iOS 12.0+
Released January 26, 2024
59.0 MB Install Download
2.24.0 (2.24.0.0)
Requires iOS 12.0+
March 15, 2024
No file in the archive for this version
Download
2.26.0
Requires iOS 12.0+
39.1 MB Install Download
2.27.0
Requires iOS 12.0+
No file in the archive for this version
Download

Bundle Size Over Time

Bundle size over time49.7 MB — December 18, 2014. 5.0 MB — May 12, 2015. 5.0 MB — December 9, 2015. 11.4 MB — November 8, 2016. 21.8 MB — July 5, 2017. 59.0 MB — January 26, 202414.7 MB29.5 MB44.2 MB59.0 MB49.7 MB — December 18, 20145.0 MB — May 12, 20155.0 MB — December 9, 201511.4 MB — November 8, 201621.8 MB — July 5, 201759.0 MB — January 26, 2024Dec 2014Jan 2024

Chart History

Top Paid View chart ›
Peaked at #32 (December 19, 2014) · 5 archived captures · Dec 2014 – Jan 2016
Top Paid · iPad View chart ›
Peaked at #35 (March 24, 2017) · 1 archived capture · Mar 2017
Top Paid · Productivity · iPad View chart ›
Peaked at #3 (June 20, 2021) · 27 archived captures · Jun 2021 – Sep 2021
Top Grossing · Productivity · iPad View chart ›
Peaked at #15 (June 24, 2021) · 27 archived captures · Jun 2021 – Sep 2021
Top Paid · Productivity View chart ›
Peaked at #18 (August 30, 2021) · 27 archived captures · Jun 2021 – Sep 2021

Ratings Over Time

sampled from 40 archived captures
DateVersionRatingRatingsPrice
December 12, 2017 1.5.2 ★ 4.4 1,464 $14.99
December 17, 2017 1.5.3 ★ 4.4 1,499 $19.99
December 15, 2018 — ★ 4.2 10,437 $9.99
December 17, 2018 — ★ 4.2 5,238 $9.99
December 6, 2019 — ★ 4.3 18,987 $9.99
December 15, 2019 — ★ 4.3 19,171 $9.99
November 26, 2020 — ★ 4.4 27,383 $9.99
November 27, 2021 2.3.0 ★ 4.4 31,663 $9.99
November 29, 2021 2.3.0 ★ 4.4 31,675 $9.99
December 2, 2021 2.4.0 ★ 4.4 31,699 $9.99
December 2, 2022 2.4.20 ★ 4.4 38,143 Free
November 30, 2023 2.19 ★ 4.4 42,725 Free
December 9, 2023 2.20 ★ 4.4 42,798 Free
December 4, 2024 2.27 ★ 4.4 45,326 Free
December 12, 2024 2.27 ★ 4.4 45,385 Free

From archived App Store listing data, captured by the Wayback Machine.

Archived Reviews

8 of 15
Biggest joke ever
     
by DisappointedArtist71 · May 8, 2026

Absolutely nothing works unless you pay lol (Not very kind to poor artists)

No you have to pay for it
     
by Uh stop this now · June 24, 2026

This sucks you can you have to pay for it and it should be free because I was dumb little app

Used to be great
     
by RGPATX · June 9, 2026

Now just a greedy cash grab with bs accounts and all kinds of hoops and bloatware. The point of this app was to support old equipment to use as another monitor. They no longer do this. They completely lost their way. YOU EVEN NEED AN ACCOUNT FOR LOCAL WIRED CONNECTIONS NOW. Totally scummy. Their ‘support’ is a useless AI that you will go back and forth with until eventually you might reach a person who will ignore everything you’ve said and then tell you there’s no longer support for older devices, which again defeats the entire original stated purpose of this app.

App no longer brings up IOS keyboard on IPad
     
by whatever_? · May 8, 2026

App is no longer bringing up an IOS keyboard, when I click on a windows 11 text box connecting from an Ipad. If this behavior continues, I will cancel plan and delete app. This behavior makes the Duet app pretty much useless. I have been successfully using the app for a long time, and it just started acting up.

Don’t buy this App!!!!! Terrible experience!!!!
     
by Pro infinate flight pilot · May 15, 2026

If you want to save headaches and most important your Money look for other apps, Definitely not this one it’s not what it used to be….. I have been using Duet since 2017…BUT during this time they have changed their business operations multiple times and each time what supposed to be a permanent license turned out to be not true. I have had to pay multiple times for the “permanent “ license. A few weeks ago… the app stopped working I contacted their tech support. They asked me for proof of purchase for 2017 and 2023 since apparently my account had vanished from their database. Luckily I was able to find the 2017 receipt. But this did not stoped there, The next thing they told me is that is that I had to buy AGAIN a license for their wireless version to be able to use the app again…. and after this the communications stopped, they are no longer answering……. It a petty that what started as a great company ends ups in like this. A perfect way to lose customers… I’m looking for other options DON’T LOOSE YOUR MONEY ON THIS APP

Vertical iPad as Second Monitor
     
by DaveS2424 · June 19, 2026

For the life of me I can’t figure out why Mac doesn’t allow vertical orientation for sidecar. No problem, I just use duet display. It allows me to use my iPad as second monitor in vertical orientation, and with good picture and no lag (I prefer wired connection). Works as advertised and the few bugs I had were fixed with a responsive support team. Thanks!

Just wow!
     
by Kingdahustla · May 15, 2026

Worth every penny !

Horrible
     
by Leute44 · July 5, 2026

Add said three dollars a month, I got charged 36 and it won’t work between my ROG Xbox Ally X and my IPad Pro. Would not recommend.

Period reviews recovered from Apple's customer-review feeds via the Wayback Machine.