ScreenRuler helps you with a reading by colouring (tinting) the screen or providing a reading toolbar. It includes ClaroView. ScreenRuler supports dual monitors.

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Underline Mode
Ruler Mode
Overlay Mode
Ruler Mode in Use
Underline Mode in Use

Trials and Demos

ScreenRuler Windows Features

Screen tinting

Some people find common black-on-white text hard to read, and prefer off-white colours. ScreenRuler can provide a coloured overlay for the whole screen so everything is tinted and easier to read. You can choose any colour you like and change colour and intensity depending on the time of day, the light conditions and what you find best.

Coloured reading ruler

Some people find focusing on the current line of text hard, and going from one line to the next as you read even harder. ScreenRuler can give you a strip or ruler across the screen. You can also make the screen outside of the strip darker to help you concentrate on the strip.


A coloured underline that goes across the screen and follows the cursor, helping you to stay on the line you’re trying to read and concentrate on.


Works with multiple monitors and any video card. Sits quietly in the system tray (Notification Area) out of the way while you work.

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ScreenRuler Windows (includes ClaroView)

Help and Documentation

User Guide
The complete user guide for ScreenRuler.
Data Sheet
The latest data sheet for ScreenRuler.
Release notes
The latest updates in ScreenRuler Windows.
Support Articles
Technical Support website articles.

System Requirements

  • Windows 10, Windows 8/8.1, Windows 7 SP1
  • 1GB RAM
  • 20MB hard disk space