Comparison

Duet Display vs 스캔PDF

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
Read full description

#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

스캔PDF

Features
Read full description

스캔PDF는 종이 문서와 사진을 빠르게 스캔해 정돈된 PDF로 만드는 문서 도구입니다. 주요 기능 • 문서 자동 경계 인식과 보정 • 최대 30페이지 스캔 및 사진·PDF 가져오기 • 페이지 순서 변경, 회전, 자르기, 필터, 삭제 • A4 세로·가로 PDF 미리보기 및 저장 • 기기 내 한국어·영어 OCR • 제목과 OCR 전문 검색 • 텍스트 복사와 TXT 내보내기 • PDF 공유, 페이지 추출·분할·합치기 • 앱 잠금과 개별 문서 잠금 • 삭제 문서 30일 복구 AI 문서 분석 사용자가 직접 동의하고 보상형 광고를 끝까지 시청한 경우 OCR 텍스트를 바탕으로 3문장 이내 요약, 문서 분류, 핵심 키워드를 제공합니다. 사진과 PDF 파일은 분석 서버로 전송하지 않습니다. AI 결과는 참고용이며 법률·의료·금융 분야의 전문적 정확성을 보증하지 않습니다. 개인정보 보호 스캔 이미지, PDF, OCR 텍스트와 분석 결과는 기본적으로 기기에 저장됩니다. 계정 가입과 클라우드 동기화 없이 사용할 수 있습니다. 광고 홈 목록에는 작업을 가리지 않는 배너 광고가 표시될 수 있습니다. 사용자가 선택한 보상형 광고로 배너를 24시간 숨기거나 AI 분석을 실행할 수 있으며, 문서 스캔·OCR·PDF 저장 기능은 광고 시청 없이 사용할 수 있습니다.

Screenshots

Duet Display3 screens
스캔PDF4 screens

Verdict

The call

The clearest difference is in-app purchases: 스캔PDF at none against Duet Display's 6. Duet Display's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 16.0). On price and ads 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. 스캔PDF asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Duet Display versus 스캔PDF: the parameters behind the verdict, then further details
ParameterDuet Display스캔PDF
PriceFreeFree
Rating4.4 (49K ratings) — better—
Positive reviews45.5% of reviews—
Number of ratings49K — better—
Update frequencyEvery 3 weeks—
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Vision Pro — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size59 MB47 MB
Age rating4+4+
DeveloperDuet, Inc.DoYou Kim

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

스캔PDF

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
None

스캔PDF

No in-app purchases

Questions

Is Duet Display free?
Duet Display is free to download, with in-app purchases available.
Is 스캔PDF free?
스캔PDF is free to download, with no in-app purchases.
Do Duet Display or 스캔PDF have ads?
Both Duet Display and 스캔PDF show ads.

Other comparisons