Core capabilities
Measure distances and boxes. Use guides and crosshair alignment. Measure on connected displays.
System
Measure distances, boxes, guides, and snapped objects across displays.
Screen Ruler opens overlays for measuring pixels, boxes, guides, and object distances on your displays.
No account or card required. Local-first Mac app.
Works locallyDesigned for on-Mac processing.
Signed and notarizedBuilt for Apple Silicon Macs.
No app telemetryNo usage tracking from Foldout itself.
Free 14-day trialNo account or card required.
What it does
Built for the common jobs people usually send to separate apps.
Measure distances and boxes.
Use guides and crosshair alignment.
Measure on connected displays.
Detailed capabilities
What Screen Ruler covers.
Concrete features, inputs, and workflow details for this tool.
Inputs and scope
Works with screen areas.
How the workflow runs
Start Screen Ruler. Choose a ruler mode. Measure the area or distance. Copy, save, or exit the overlay.
Screen Ruler use cases
Common uses include uI QA, design handoff, pixel checks, and layout debugging.
How to use it
From opening the tool to saving the result.
- 01
Start Screen Ruler.
- 02
Choose a ruler mode.
- 03
Measure the area or distance.
- 04
Copy, save, or exit the overlay.
Questions
Before you try Screen Ruler
Does live measuring need screen recording permission?
Basic measuring is permission-free; frozen snapshots or smart snapping may require screen access.
Related tools