VocaBox - Vocab Trainer

VokabelBox Vocabulary Trainer is a Chrome extension that helps you learn vocabulary in a structured, lasting way. Use three exercises—Exercise, Vocabulary Test, and Card Box—to add new words, monitor your progress with a diagram, and organize vocabulary into Book/Chapter/Lessons folders for systematic study.

By default the app limits to 50 words for testing; upgrade via in‑app purchase to unlock unlimited vocabulary. It supports XLSX imports, backups to transfer progress between devices, and a six-compartment card box that uses spaced repetition (adjustable gaps: 1, 4, 7, 14, 60, 180 days) to boost long-term memory. It also offers dozens of languages and easy folder-based organization to structure vocabulary by book, chapter, or lesson.