Apps / Monoscope

Monoscope app icon

Monoscope

Test patterns that travel. Custom-resolution bars, ramps, grids and geometry checks — plus a dedicated LED-wall mode — from one portable format that renders identically on web, iPhone, iPad and Mac.

Web app — live Mac app — available iOS — coming soon .monoscope format
Launch the web app ↗ Download for Mac ↓

Try it right here

The full web app, running in your browser — build a pattern, then open it full-screen on the display you're feeding.

Open full screen ↗

Get Monoscope for Mac

The native Mac app is here — free, notarised and signed, with full-screen display output and offline use. iPad and iPhone apps are coming next; the web app above is live now too.

Available

Prefer the Terminal? brew install --cask halfgreybear/tap/monoscope

Not sure which pattern you need? Read the guide: Test patterns for projectors and LED walls.

What it does

  • 01

    Custom-resolution patterns

    Set any resolution and generate colour bars, ramps, grids, crosshatch and geometry checks — pixel-exact, every time.

  • 02

    LED-wall mode

    Border and label every panel in the rig, so a dead tile, a swapped data run or a mapping error shows up in seconds — not during the show.

  • 03

    Calibration & uniformity

    A pack of patterns for setting brightness, colour and uniformity across a wall before doors open.

  • 04

    Motion & timing

    Moving patterns for chasing latency, tearing and frame-sync issues down the whole signal chain.

  • 05

    One portable format

    A pattern is a tiny .monoscope file. Save it on the Mac, open it on the web — it renders identically. Share a setup with the whole crew.

  • 06

    Drive a real screen

    Push a pattern full-screen to a connected display at its native resolution, or export a pixel-exact PNG to load anywhere.

A few of the patterns

SMPTE-style vertical colour bars test pattern.
Colour bars
White alignment grid with crosshatch and centre marker on black.
Alignment grid
Greyscale gradient ramp from black to white.
Greyscale ramp

Support

Monoscope is built and supported by HALF GREY BEAR. The web app needs nothing installed — open it and go. Found a bug, or want a pattern it doesn't have yet? Email the studio.

Launch the web app ↗ email support ↗
Do I need to install anything?
No — the web app runs in any modern browser, with nothing to install. The native Mac app is available now, for offline use and full-screen display output; iPhone and iPad apps are on the way.
What's a .monoscope file?
A tiny JSON description of a pattern. Because every version of Monoscope reads the same format, a pattern saved on the Mac opens and renders identically in the web app — so you can share a tested setup with the whole crew.
Does it work offline?
The web app renders entirely in your browser. Once the page has loaded it doesn't need us, or the internet, to generate patterns.
Can I install the Mac app with Homebrew?
Yes: brew install --cask halfgreybear/tap/monoscope. The cask tracks new releases automatically, and the app still updates itself in-app.

Privacy

Monoscope collects no data. No account, no analytics, no tracking. The web app runs entirely in your browser; the patterns you build and any .monoscope files stay on your device. Nothing is sent to HALF GREY BEAR.

Questions about privacy? email us. Last updated June 2026.