microDisplay by microAI

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Your iPad, iPhone and Android,
now displays for your Mac.

microDisplay is a menu bar app that turns iPads, iPhones and Android devices into wireless extended displays for your Mac — up to three at once. On the device, just scan a QR code in a browser. Nothing to install, no App Store.

Download for Mac Buy

Free 1-day trial after install · macOS 15 or later (Apple silicon & Intel) · viewer: iPhone, iPad, Android — anything with a browser, even a PC

01 Wireless extended displays

Your desktop, physically bigger.

Connect up to three devices at once — iPad, iPhone, Android — each one an independent extended display, not a mirror. Docs on the iPad, Slack on the iPhone: your Mac desk simply grows.

02 Connect with a browser

No app.
Just scan a QR.

Pick “Start a display” from the menu bar and a QR code appears. Point the device's camera at it, and it becomes a display in seconds. The viewer is served from the public domain md.microai.jp, so there are no certificate warnings.

Any device with a browser works — iPhone, iPad, Android, even a spare PC. The URL never changes, so a bookmark or home-screen shortcut (PWA) is the fastest route next time.

Start a display

md.microai.jp Point the device's camera at the code

Connected — display 3

03 Ultra-low latency

The cursor never lags.

From receive to draw in a measured 2–3 ms. A custom WebCodecs path bypasses WebRTC's jitter buffer entirely (100 ms+ on iOS, uncontrollable). Grab a window and the second screen moves with it — the way it should, wirelessly.

Receive → draw (measured)

2–3 ms

Typical WebRTC (jitter buffer) 100 ms+ · uncontrollable

microDisplay (WebCodecs direct) 2–3 ms

04 Adaptive streaming

Shaky Wi-Fi?
It keeps flowing.

Measured queue delay feeds back into the encoder, stepping bitrate → frame rate → resolution automatically. Keeping latency low always wins; quality gives way only as much as needed. Even on crowded office Wi-Fi, the video keeps moving.

Wi-Fi good Congestion — adapting

42 Mbps · 60 fps 9 Mbps · 30 fps

Steps: bitrate → fps → resolution Latency never queues

05 Sharp HiDPI

Text stays sharp.

A virtual display is generated to match your device's exact viewport — native resolution, no scaling, no stretching, Retina-crisp text. Rotation and going full screen are followed on the spot.

永Aa

Mirroring (stretched) microDisplay — native 2× HiDPI, auto-generated

06 Tap, drag and pinch

A display you can touch.

Tap to click, one-finger drag to scroll. Long-press and a blue ring signals drag & drop (Android vibrates); release in place for a right-click. While pinch-zoomed, taps map to what you actually see — zoom in and hit small buttons precisely.

Long-press → drag & drop Pinch-zoom → tap precisely

07 Self-healing

Drops? It comes back by itself.

A streaming watchdog and automatic retries keep watch. After a disconnect the display is preserved for 8 seconds — reconnect and it resumes as the same display, window layout intact. A Wi-Fi dip doesn't derail your work.

Reconnecting — display preserved Holding window layout for 8 seconds

Connected Reconnecting… Back — same layout

08 Trust no relay

The relay can't
see your screen.

The secret key lives only in the QR code (URL fragment) and is never sent to the server. Endpoints verify each other with HMAC signatures, and video flows LAN-direct, DTLS-encrypted end to end. All that touches the relay is a few KB of signaling.

On networks where a direct path is impossible — tethering, client isolation, cellular — it falls back automatically to an encrypted TURN relay. Even then the relay only carries packets it cannot decrypt: no one but your devices ever sees the screen.

Relay Only a few KB of signaling pass through

Mac

iPhone / iPad

DTLS-encrypted · end-to-end

Video stream — LAN-direct by default 3 KB

How is it different from Sidecar?

Sidecar is a great built-in feature of macOS. microDisplay covers everything outside its conditions.

microDisplay Sidecar

iPhone as a display Yes — iPad only

Device on a different Apple Account Any account Same account required

Reviving an old iPad Fine if a browser runs Supported models only

Device-side setup Scan a QR — nothing to install None on supported iPads

Touch control Tap · scroll · drag & drop Apple Pencil only

Simultaneous displays Up to 3 1

09 Menu bar resident

Quietly, in the menu bar.

Light, and out of the way. On an offline LAN with no internet, it falls back to a local path and keeps working.

microDisplay File Edit View Help 10:09

microDisplay Waiting for a device…

Stop display

Open this on your iPad / iPhone

md.microai.jp/#r=xK4mQ9vZpN&k=fR7sWn2bTe8…

Placement — which side of the main display

Settings…

About microDisplay

Quit microDisplay ⌘Q

Simple pricing.

Every feature in both — the only difference is how updates arrive. Try everything free for a day after install.

Recommended Subscription

$36 / year

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Every feature · up to 3 displays at once
Always the latest version
New features as they ship

Start yearly

One-time

$29 once

Yours forever — no subscription

Every feature · up to 3 displays at once
Updates for the current major version
Perpetual license

Buy once

A license key arrives by email and follows your microAI account. Checkout is handled by a Merchant of Record; prices include tax.

Your desk gets bigger today.

That iPad in a drawer, the iPhone in your pocket — put them back to work.