Comparison

iDisplay vs Luna Display

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

Head to head
About

iDisplay

Transform your iPhone or iPad into a touch-enabled secondary display for your Mac or Windows computer. Extend your desktop space, interact with apps like Excel and Photoshop, and enjoy a seamless extension of your computer's capabilities wirelessly or via cable.

Highlights
  • External touch-screen display
  • Mirror or extend desktop
  • Full desktop app support
  • Touch interaction
  • Wireless or cable connection
  • Portrait/landscape rotation
  • Retina display support
Features
Read full description

Turn your iPad or iPhone into an additional touch-screen display for your Mac or Windows computer or mirror your desktop. All usual desktop apps, such as Excel, Word, PowerPoint or Photoshop, are available with desktop features on iPad and iPhone, touch-enabled. Works with both, Lightning and 30-pin cable connection or Wifi on macOS (with almost 0 latency). Double your personal productivity by extending your computer screen. Perfect tool for multitaskers, iDisplay lets you use your iPad and iPhone as an interactive touch-screen wireless display to give you more screen real estate. Works with up to 60fps. Recommended by Kim Komando, tech guru of USA Today. "iDisplay app turns your iPad or iPhone into secondary screen – too good to be true. That's... brilliant. I mean, I can think of about a billion uses for this." MobileCrunch "Yet another reason to buy an iPad: iDisplay" MobileWhack Why choose iDisplay over hardware display? Your iPad, iPad Pro, iPhone and iPod touch can be your secondary display. Works with both Mac and Windows computers. iDisplay lets you interact with your additional display: move objects, draw, control playback. Pan and zoom your desktop right on iOS device. Easily switch between portrait and landscape screen orientations: simply rotate your device and it will adjust automatically. Normal and double resolution modes for Retina displays. Customize display settings for each device you use as your secondary display, iDisplay will remember your preferences. Work with Excel, Word, Power Point and other apps and have all desktop features available on your iPad or iPhone. On macOS you can choose one of the following iDisplay modes: Use iDisplay as a regular secondary display: gives you more screen space for everything you have to keep your eye on. Mirror image from main display on your iPad / iPhone: comes in handy when you need to share your desktop with your audience. Keep in mind that iDisplay allows to connect multiple devices to one Mac! Yes, lots of them! Many colleges use iDisplay. On Windows, iDisplay can be used as a regular secondary display. COMPATIBILITY: macOS iDisplay Desktop application needs to be installed on your Mac. iDisplay Desktop is free and can be downloaded anytime at getidisplay.com iDisplay is compatible with Macs with Intel CPUs running on Mac OS X 10.9 and later. macOS Sierra supported! Windows iDisplay Desktop application needs to be installed on your PC. iDisplay Desktop is free and can be downloaded anytime at getidisplay.com iDisplay is compatible with Windows XP (32­bit only), Windows Vista (32­ and 64­bit), Windows 7 (32­ and 64­bit), Windows 8 and Windows 10. For Windows Vista and Windows 7 "Aero" theme may be disabled when connected to iDisplay and will be re­enabled upon disconnection). NETWORK CONNECTIVITY Your computer and iOS device must be connected by cable or to the same Wi­Fi network.

About

Luna Display

Transform your iPad into a wireless second display for your Mac or PC. This hardware-enabled solution offers low latency and high image quality, supporting touch gestures and Apple Pencil for a seamless extension of your computer's capabilities.

Highlights
  • Wireless second display for Mac/PC
  • Supports touch and Apple Pencil
  • Low latency performance
  • Mix and match devices (PC-to-iPad, Mac-to-iPad)
  • Headless mode for Mac mini/Pro
  • Connect via Wi-Fi or USB
Features
Read full description

Turn your iPad into a wireless second display for Mac or PC. Purchase hardware at www.lunadisplay.com — available for USB-C, HDMI, and Mini DisplayPort. MIX AND MATCH DEVICES Luna Display seamlessly extends your computer to another screen. Make the most of your devices with Luna Modes: · PC-to-iPad · Mac-to-iPad · Mac-to-Mac · Headless Mode (for Mac Pro and Mac mini) SETS UP IN SECONDS Simply plug Luna into your computer, launch the Luna apps, and you’re off and running. Hardware is available for purchase at lunadisplay.com. DESIGNED FOR HEAVY-DUTY WORK Luna's hardware ensures compatibility with any desktop app, delivering stunning image quality and low latency performance at 16ms. You get all the reliability of a traditional monitor, with the flexibility of your iPad. CONNECT OVER WIFI OR USB Luna was designed from the very beginning to work wirelessly. Your devices will automatically connect if they’re on the same WiFi network. And if WiFi isn’t available, you can also connect your devices over USB. FULL TOUCH SUPPORT AND GESTURES Luna Display acts as a complete extension to your computer, with full support for: · External keyboards · Apple Pencil · Touch interactions (pinch, pan, zoom, tap) SYSTEM REQUIREMENTS · Primary PC: Microsoft Windows 10 64-bit, Build 1809 or later · Primary Mac: macOS 10.13 (El Capitan) or later · Secondary iPad: iOS 12.1 or later · Secondary Mac: macOS 10.13 (El Capitan) or later FOR ARTISTS: WORKS WITH ASTROPAD Luna fully integrates with our award-winning drawing software Astropad Studio. Luna extends Astropad Studio to create a fully customizable drawing tablet on your iPad. With Luna, your art is no longer limited by the size of your computer display. THE POWER OF OUR LIQUID TECHNOLOGY Using our proprietary LIQUID Technology, Luna Display provides crystal clear image quality, reliable performance, and wireless flexibility. · Uncompromised image quality · Lag-free performance at 60 frames per second · GPU acceleration, so your computer stays fast and optimized · Hand optimized ARM & x86 assembly to maximize battery life · Velocity Control, which analyzes network conditions dozens of times per second PRESS · “Luna’s visual fidelity is frankly stunning” — TechCrunch · “Luna will change your travel workflow” — iMore · “For the first time a wireless solution has impressed us” — Apple Insider GET IN TOUCH · Support: support@astropad.com · Instagram: @astropadco · Twitter: @astropad · Facebook: facebook.com/astropadco

Screenshots

iDisplay4 screens

Verdict

The call

The clearest difference is review sentiment: Luna Display at 76% against iDisplay's 20%. Luna Display also leads on rating (4.8 vs 1.9) and ratings volume (4K vs 105). iDisplay's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 13). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Luna Display holds the better App Store score, 4.8 against 1.9. That said, the two scores are not equally well evidenced: Luna Display has 4K ratings behind it against 105, so its average is the more settled of the two. Written reviews point the same way: 20% of iDisplay's written reviews are positive against 76% of Luna Display's.

UpkeepUpdate frequency

iDisplay ships an update every 6 weeks, Luna Display every 2 months. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
iDisplay versus Luna Display: the parameters behind the verdict, then further details
ParameteriDisplayLuna Display
PriceFreeFree
Rating1.9 (105 ratings)4.8 (4K ratings) — better
Positive reviews19.7% of reviews76.3% of reviews — better
Number of ratings1054K — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS8.0 — better13
Further details — not scored
Size36 MB60 MB
Age rating4+4+
DeveloperSHAPE GmbHAstro HQ

Customer experience

iDisplay

All ratings105 ratings
Positive21.0%
Neutral1.9%
Negative77.1%
Written reviews233 reviews
Positive19.7%
Neutral3.9%
Negative76.4%

Luna Display

All ratings4,002 ratings
Positive97.3%
Neutral1.3%
Negative1.4%
Written reviews283 reviews
Positive76.3%
Neutral4.9%
Negative18.7%

User reviews

iDisplay

From 105 App Store ratings

What we love

  • 🚀 Works as advertised
  • 👍 Useful for extending display
  • 💡 Ability to control iPad with mouse

Room to improve

  • 🐛 Connectivity issues
  • 🐛 Causes system crashes
  • 🐛 Laggy performance
  • 🐛 Resolution/scaling problems
  • 🔋 High resource consumption

Luna Display

From 4K App Store ratings

What we love

  • 🚀 Reliable even when Sidecar is not
  • 🚀 Absolutely magic in every respect
  • 🚀 Headless Mac
  • 👍 Great software
  • 🚀 Really Cool Way to Use IPad with Windows or Mac

Room to improve

  • 🔑 Keyboard Input on screen…
  • 🐛 Constantly begging for a rating
  • 🔑 Nice product if connected by wire
  • 🐛 Cannot right click with pencil
  • 🔑 No full screen on iPadOS 18.2 external displays.

Bugs and requests

iDisplay

Reported bugs

3 issues
  • Incompatibility with newer OS versions
  • Phantom display issues
  • Crashes and freezes

Requested features

4 requests
  • Support for more devices and OSes
  • Improved responsiveness and stability
  • Better resolution handling
  • Wired connection option

Luna Display

Reported bugs

3 issues
  • No full screen on iPadOS 18.2 external displays.
  • Does not work anymore
  • Cannot pair with windows PC

Requested features

4 requests
  • Portrait mode
  • Locked cursor support
  • Magic Keyboard Support
  • Automatic login in headless mode

In-app purchases

None

iDisplay

No in-app purchases

None

Luna Display

No in-app purchases

Questions

Is iDisplay free?
iDisplay is free to download, with no in-app purchases.
Is Luna Display free?
Luna Display is free to download, with no in-app purchases.
Which has better reviews, iDisplay or Luna Display?
Luna Display is rated higher. iDisplay averages 1.9 out of 5 from 105 ratings, while Luna Display averages 4.8 from 4K ratings.
Do iDisplay or Luna Display have ads?
Neither iDisplay nor Luna Display shows ads.
Which is updated more often, iDisplay or Luna Display?
iDisplay ships an update every 6 weeks, and Luna Display every 2 months. Most recently, iDisplay was updated on October 24, 2026 and Luna Display on October 24, 2026.

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