26Keys

About

26Keys proofreads what you write without rewriting it for you. When it finds a mistake it explains why the phrasing is wrong, adds that mistake to a short daily drill, and later has you say the corrected sentence out loud, on the theory that the English you write is the English you end up speaking. It also flags sentences that could be read two ways and asks you which one you meant. It needs macOS 26 or later, and it runs without an account during the trial.