Display Ruler
Second
Window
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About Center of My Screen

Find the physical center of your screen on any device with this minimalist, installable web app.

Multiple Screens

The "Second Window" button can help you do this for multiple screens or sections of your screen at the same time.

Ruler App

Provide your diagonal screen size to display a true-scale ruler onscreen. Enter the size in inches, cm, parsecs — it's up to you!