Word Ocean: Vocabulary Book

Pass Words is an English vocabulary app that turns your lock screen into a daily learning space, so you are not limited to memorizing words only when you open the app.
Every time you turn on your screen, you can naturally review the words and sentences you are currently learning. Repeated exposure builds up without needing extra study time. Check words on your lock screen, then reinforce them inside the app with flashcards and quizzes. Vocabulary learning becomes lighter, easier, and more consistent.
Key Features
• Lock Screen Word Cards
View the words and sentences you are learning directly on your lock screen. Choose from words only, sentences only, or both.
• Lock Screen Folder Selection
Show only words from selected folders on your lock screen. Perfect for exams, daily word sets, or weak words.
• Manage Words and Sentences
Save and organize both individual words and full English sentences.
• Flashcard Review
Flip through cards, check meanings, and mark words as memorized.
• Typing Quizzes
Practice Korean → English and English → Korean by typing your answers. Track accuracy and review count.
• Pronunciation Playback
Listen to English words and sentences to improve pronunciation.
• OCR Camera Input
Scan words from books, printouts, or worksheets with your camera and quickly add them to your vocabulary list.
• Folder Organization
Organize words and sentences by folder, with easy move, edit, delete, and rename options.
• Search and Filters
Find words quickly by all, learning, memorized, or favorites.
• Favorites and Memorized Status
Save important words as favorites and mark completed words as memorized.
• Word Ocean / Sentence Ocean
Explore new words and sentences, then add only the ones you need to your own vocabulary list.
• xlsx Import
Download an Excel template, organize words, meanings, examples, and parts of speech, then import them all at once.
• Google Drive Backup
Back up your vocabulary data to your Google Drive app folder and restore it whenever needed.
• Automatic Word Updates
Check for new word data and add it without duplicates.
• Dark Mode
Study comfortably with a dark theme.
Pass Words is more than a simple vocabulary storage app.
Review once on the lock screen, once with flashcards, and once more with quizzes.
By seeing words often, recalling them actively, and organizing only what you need, Pass Words helps English vocabulary stay naturally in your memory.
Recommended for students preparing for English exams, learners who want to build vocabulary little by little every day, and anyone who wants to quickly save words from books, lessons, or study materials.