Comparison

Luna Display vs Arch Buddy

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

Head to head
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

About

Arch Buddy

Features
Read full description

There's a stack of unread text between you and what you need to know. Arch Buddy is your personal Robo-Archivist—turning that wall into a timed, winnable session. Scan any printed page with your camera, paste a link, upload a document, or load a full ebook — then read one precise word at a time, at a speed you control, with the power to pause and rewind. RSVP (Rapid Serial Visual Presentation) speed reading strips away the friction and puts the text right in front of you, word by word, until you're through. Every session builds something that stays. Your personal Archive grows richer the more you read. By earning Bookmarks and Scrolls, you unlock new Realms, Augments and Arch Buddy companions. Watch as your reading speed increases, your shelves fill and the ancient library changes around you. Maintain your streak and your reward multiplier climbs. Each reading session genuinely matters. WHAT ARCH BUDDY DOES: — Scan text from any surface — your first scans use AI for extra-sharp results, then fast on-device scanning — Import documents (PDF, DOCX, RTF, TXT) or pull clean text from any URL — Read full ebooks (EPUB, PDF), split into chapters with progress saved per chapter — RSVP speed reading at 100–1200 WPM with smart Dynamic Speed ramping — Highlight colour customization that expands as you unlock new Realms — A living Archive home screen that reflects your reading history — Collectible Realms: Mesopotamian, Egyptian, Greek, Roman, Futuristic and more — Craft your Arch Buddy with unlockable skins in the Foundry — Streak multiplier that climbs as you keep your daily reading streak — Full dark-mode design built for focus, not distraction Arch Buddy is for people who want to hone their attention span. Not a speed-reading flex. Not a productivity dashboard. A quiet, evolving sanctuary where every page you finish earns something permanent. The library is waiting. The Arch Buddy is ready. The text is not going to read itself. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Arch Buddy4 screens

Verdict

The call

The clearest difference is in-app purchases: Luna Display at none against Arch Buddy's 8. Luna Display also leads on iOS requirement (13 vs 15.1). Arch Buddy's advantage is update cadence (weekly vs every 2 months) and device support (3 vs 1). 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. Arch Buddy sells 8 in-app purchases, starting at $11.49 per year. Luna Display asks for nothing beyond the download.

UpkeepUpdate frequency

Luna Display ships an update every 2 months, Arch Buddy weekly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
Luna Display versus Arch Buddy: the parameters behind the verdict, then further details
ParameterLuna DisplayArch Buddy
PriceFreeFree
Rating4.8 (4K ratings) — better—
Positive reviews76.3% of reviews—
Number of ratings4K — better—
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPadiPhone, iPad, iPod — better
Requires iOS13 — better15.1
Further details — not scored
Size60 MB90 MB
Age rating4+4+
DeveloperAstro HQArjun Rai Babber

Bugs and requests

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

Arch Buddy

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Luna Display

No in-app purchases

8 purchases

Arch Buddy

Subscriptions1
  • Arch Buddy Pro$11.491 Year
One-time7
  • Merriweather Font$1.49
  • Crimson Pro Font$1.49
  • Lato Font$1.49
Show 4 more
  • Playfair Display Font$1.99
  • 100 Deep OCR Scans$1.99
  • Paleo Skin$2.99
  • Mimi Skin$2.99

Questions

Is Luna Display free?
Luna Display is free to download, with no in-app purchases.
Is Arch Buddy free?
Arch Buddy is free to download, with in-app purchases available.
Do Luna Display or Arch Buddy have ads?
Neither Luna Display nor Arch Buddy shows ads.
Which is updated more often, Luna Display or Arch Buddy?
Luna Display ships an update every 2 months, and Arch Buddy weekly. Most recently, Luna Display was updated on October 26, 2026 and Arch Buddy on October 25, 2026.

Other comparisons