Leafy is a free macOS vocabulary app. Press ⌥A to scan any word on screen — in PDFs, ebooks, or images — get the definition instantly, and save it to your personal word library. No account, no ads.
Leafy — Vocabulary Builder for Mac
Launch date
Leafy — Vocabulary Builder for MacLook up and save words on screen without leaving the page.
Launched on July 4th, 2026