Duet Display vs iDocCam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
iDocCam
Transform your phone into a document camera for large-screen projection. Control your device's camera in real-time and adjust live images. Connect to projectors or external displays for presentations and teaching.
- Real-time camera control
- Document camera functionality
- Large-screen projection
- Wi-Fi connectivity to Visualizer
- HDMI/VGA and AirPlay output
- Image filters
- Video recording
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iDocCam is an app that allows you to control your iPhone’s camera in real-time, and even turn it into a document camera for large-screen projection. You may subscribe to iDocCam either on a monthly or yearly basis. There are 3 ways to use it: 1. Use iDocCam as a standalone app. Use it as a standalone app to view and adjust live images captured by your iPhone’s camera. 2. Use iDocCam with IPEVO Visualizer software Install iDocCam on your iPhone. And then, install IPEVO Visualizer software on a computer, tablet, or smart TV*. Connect your iPhone and your device to the same wireless network. Launch iDocCam and Visualizer respectively*. After that, choose your iPhone as the camera source in Visualizer. You’ll then be able to view the live images of your iPhone’s camera in Visualizer. You can then control and adjust the live images using Visualizer. And if you connect your device to a projector, the live images will be projected onto a large screen, turning your iPhone into a document camera instantly. *For more information about IPEVO Visualizer, please visit https://www.ipevo.com/visualizer . *If you’re using your iPhone in conjunction with Visualizer on an iOS or macOS device, you do not need to connect them to the same wireless network. You can connect them via Bluetooth instead. 3. Connect iDocCam to an external display via HDMI/VGA, or AirPlay Launch iDocCam on your iPhone. Then, connect your iPhone to an external display via HDMI/VGA via a Lightning to HDMI/VGA adapter, or AirPlay (using Apple TV). Now you can use the external display as an extended screen to project the live images of your iPhone’s camera. #Trial Version Available features: • Snapshot* • Wi-Fi connectivity to IPEVO Visualizer and Virtual Camera* • HDMI, VGA, and Airplay projection* *Digital watermark applied on output. #Full Version Added features: • No watermark • High-resolution video and image • Customizable camera settings • Image filters • Video recording • Timelapse recording • Power-saving mode • Voice control • Full-screen controller
Screenshots
Verdict
The clearest difference is rating: Duet Display at 4.4 against iDocCam's 2.4. Duet Display also leads on monetization model (free with in-app purchases vs subscription) and ratings volume (49K vs 42). On price, update cadence, ads and in-app purchases 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
Both are free to download. Duet Display sells 6 in-app purchases, starting at $3.99 per month and iDocCam sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Duet Display holds the better App Store score, 4.4 against 2.4. That said, the two scores are not equally well evidenced: Duet Display has 49K ratings behind it against 42, so its average is the more settled of the two. Written reviews point the same way: 46% of Duet Display's written reviews are positive against 24% of iDocCam's.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 24, 2026 and September 19, 2026 respectively.
| Parameter | Duet Display | iDocCam |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (49K ratings) — better | 2.4 (42 ratings) |
| Positive reviews | 45.5% of reviews — better | 23.5% of reviews |
| Number of ratings | 49K — better | 42 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, iPod, Vision Pro — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 69 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Duet, Inc. | IPEVO |
Customer experience
Duet Display
iDocCam
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
iDocCam
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Duet Display
- Duet Starter (Monthly)$3.991 Month
- Duet Air (Monthly)7 Days trial$5.991 Month
- Duet Pro7 Days trial$7.991 Month
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- Duet Starter (Annual)$39.991 Year
- Duet Air (Annual)7 Days trial$49.991 Year
- Duet Pro (Annual)7 Days trial$79.991 Year
iDocCam
- Full Features (Monthly Plan)1 Month trial$0.991 Month
- Full Features (Yearly Plan)1 Month trial$9.991 Year
- iDocCam with Full Features$19.99
Questions
Is Duet Display free?
Is iDocCam free?
Which has better reviews, Duet Display or iDocCam?
Do Duet Display or iDocCam have ads?
Which is updated more often, Duet Display or iDocCam?
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