Onde Screen rulers, highly configurable screen measuring utility with many intuitive features, enable you to measure objects quickly and precisely on your Mac screen in Pixels, Inches, Picas, Centimeters and multiple customizable units according to your need.
This screen ruler can measure square areas, diagonals and display angles. A horizontal and vertical ruler can be used independently or simultaneously. Diagonal ruler make it easier to measure diagonal objects on Mac. 

Customizable settings of color, transparency, ruler rotation, calibrate length and angle units and keyboard shortcuts are some features of our Mac screen ruler. This screen ruler also features a dynamic mouse tracking measurement, precise positioning under Mac by a magnifying Detail window,guidelines and sight adjustment of direction key control.
Memorizing Function makes the screen ruler remember previous condition and location of Detail window and Logger window while you open it.