ReadTune, a reading setup that earns its settings

Field notes

ReadTune uses a four-minute calibration built from six short passages, testing one change at a time while combining reading time, comprehension, and an ease rating. Its profile can adjust fonts such as Atkinson Hyperlegible, OpenDyslexic, and Lexend, alongside spacing, line width, contrast, and one-, three-, or five-line focus modes. The page also describes sentence-and-word highlighting for on-device read-aloud, with profiles and history retained in browser storage rather than an account.