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Add a semi-transparent ruler with keyboard shortcuts to your desktop.
Know the exact size and position of any element with this screen ruler.
Get the size of any item on the screen.
Meassure distances and angles on your desktop.
Measure objects.
Millimeter is a simple free screen ruler app.
Add a resizable ruler to your desktop.
Millimeter Pro is a easy to use and helpful measurement tool for iPhone or iPad.
A pop-up set of vertical and horizontal rulers to measure inches, centimeters, or pixels.