Ten instruments for your screen.
Each one measures something different, and each one works the same way: press ⌃⌥M, choose it with a number key, place it, read it.
Straight Ruler
Free Lay a ruler on anything and read its length. Free forever. Learn moreCorner Ruler
Pro An L-square that reads width and height from one corner at once. Learn moreCaliper
Pro Point-to-point distance, with ΔX and ΔY for diagonals. Learn moreRectangle Frame
Pro Width × height and aspect ratio of any rectangular area. Learn moreCircle Gauge
Pro Diameter and radius of round things — avatars, icons, buttons. Learn moreCrosshair
Pro Exact pixel coordinates anywhere, with an optional origin. Learn moreGap
Pro The spacing between two elements, horizontal or vertical. Learn moreAngle
Pro A protractor for angles between 0° and 180°. Learn moreGrid
Pro Column, baseline, square and dot grids across the whole screen. Learn morePixel Probe
Pro One pixel, magnified — with its exact coordinates. Learn moreEach Pro instrument opens once for a full session, so you can try it on your own work before you buy.