Reading Ruler by Oren Trutner

Reading Ruler highlights the line of text under the mouse cursor. This helps you focus on the text you are currently reading, or come back to it if your mind wanders as you read.

The ruler works best for articles, blogs and long posts. You can disable it on pages or sites where it doesn't help as much.

Reading Ruler does not collect your data. It does not send anything to the cloud. It does not collect telemetry. It is not interested in monetization; and, it definitely does not show ads.

Reading Ruler is open source. And the source is short and sweet and that. You are welcome to take a look and convince yourself that the ruler does exactly what it says it does. Find us at https://github.com/orentrutner/reading-ruler.