Comparison

Duet Display vs Focus Range

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Duet Display

Transform your iPad or iPhone into an advanced, lag-free extra display for your Mac or PC. Interact with your computer using touch and gestures, and unlock professional drawing capabilities with Apple Pencil support.

Highlights
  • Extra display for Mac & PC
  • Lag-free performance
  • Touch and gesture support
  • Apple Pencil integration
  • Professional drawing tools
  • Portable productivity
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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

About

Focus Range

Features
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Check the camera focus range with image. ** Introduction ** This app is a camera focus range calculation app. Have you ever thought that when you took a picture, you thought it was in focus, but when you checked it on your computer, it was out of focus? Have you ever thought that it doesn't it bother you when you print a photo you took in a small size, but when you zoom it, you're worried about blurring? When you want to focus on both the subject and the background with pan focus, when you want to know the range of focus if you change the lens focal length and aperture, please check the focus range with this app and use it as a reference for shooting. Since you can register multiple My Cameras, it is also recommended for people who use multiple cameras properly. ** Overview ** - You can check the focus range simply by setting the lens focal length, F-number, and focus distance. - It is easy to switch between multiple cameras by setting the type of camera image sensor and the number of pixels. - You can adjust the accuracy according to the use, such as printing a photo in a large size or printing it in a small size. ** Characteristics ** - You can intuitively check the focus range, focus position, etc. with animation. - Settings can be changed simply by scrolling the values, so easy operation is possible with one hand. - You can change the lens focal length range and F-number setting range according to the lens you own. ** Terms of Use ** https://coconutsdevelop.com/en/terms/terms_of_use.html ** Developer website ** https://coconutsdevelop.com/

Screenshots

Duet Display3 screens
Focus Range4 screens

Verdict

The call

The clearest difference is update cadence: Duet Display at every 3 weeks against Focus Range's every 2 months. Duet Display also leads on iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Duet Display sells 6 in-app purchases, starting at $3.99 per month and Focus Range sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Duet Display ships an update every 3 weeks, Focus Range every 2 months. The most recent releases landed on September 24, 2026 and August 10, 2026 respectively.

Scorecard2 real differences · 8 level
Duet Display versus Focus Range: the parameters behind the verdict, then further details
ParameterDuet DisplayFocus Range
PriceFreeFree
Rating4.4 (49K ratings) — better
Positive reviews45.5% of reviews
Number of ratings49K — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases
DevicesiPhone, iPad, iPod, Vision Pro — betteriPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size69 MB59 MB
Age rating4+4+
DeveloperDuet, Inc.Toshiya Hondo

Bugs and requests

Duet Display

Reported bugs

3 issues
  • Incompatibility with certain software and drivers
  • Laggy performance and input delays
  • Unreliable connection and frequent disconnects

Requested features

4 requests
  • Improved resolution and scaling options
  • Better support for older devices and Windows
  • More customization and control over settings
  • Wireless connectivity without subscription

Focus Range

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Duet Display

Subscriptions6
  • Duet Starter (Monthly)$3.991 Month
  • Duet Air (Monthly)7 Days trial$5.991 Month
  • Duet Pro7 Days trial$7.991 Month
Show 3 more
  • Duet Starter (Annual)$39.991 Year
  • Duet Air (Annual)7 Days trial$49.991 Year
  • Duet Pro (Annual)7 Days trial$79.991 Year
1 purchases

Focus Range

Subscriptions1
  • Remove Ads (Monthly)$1.991 Month

Questions

Is Duet Display free?
Duet Display is free to download, with in-app purchases available.
Is Focus Range free?
Focus Range is free to download, with in-app purchases available.
Do Duet Display or Focus Range have ads?
Both Duet Display and Focus Range show ads.
Which is updated more often, Duet Display or Focus Range?
Duet Display ships an update every 3 weeks, and Focus Range every 2 months. Most recently, Duet Display was updated on September 24, 2026 and Focus Range on August 10, 2026.

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