Frequently asked questions.
If you're having trouble, start here!
or ask a human for help.
We use user donations to make the extension better, and to fund our upcoming mobile app
As you browse book web pages, Read Up automatically looks up reading level data and displays that data directly on the web page you're viewing
✅ ATOS® Book Levels, AR Points values, and wordcounts come directly from arbookfind
✅ Lexile® Levels come directly from lexile
✅ Fountas & Pinnell Guided Reading Levels (F&P GRL) are estimated from the ATOS values, using a conversion chart
✅ Equivalent grade levels are based on the ATOS values
We welcome bug reports and feature requests!