Master Vocabulary with Science-Backed Spaced Repetition
Learn smarter, not harder. MassVocabulary uses the FSRS algorithm to help you memorize words efficiently and retain them long-term.
Supported Languages
How It Works
MassVocabulary combines frequency-ordered vocabulary with contextual learning and spaced repetition for maximum retention.
Learn Words in Context
Each word is presented within a real example sentence, showing you how it's actually used in natural speech.
Recall from Context
During review, the target word is hidden. You recall it from the sentence context, training natural usage.
Smart Scheduling
FSRS calculates the optimal review time for each word. Difficult words appear more often, easy ones less frequently.
Everything You Need to Master Vocabulary
Built with proven learning science and packed with features for serious language learners.
10,000 Frequency-Ordered Words
Learn the most important words first. Courses contain up to 10,000 words sorted by how often they appear in real usage, so you can start having real conversations faster.
Contextual Learning with Word Hiding
Every word comes with an example sentence. During review, the target word is hidden and you recall it from context—training your brain to use words naturally.
FSRS Spaced Repetition
Built on the state-of-the-art FSRS algorithm. MassVocabulary calculates the perfect time to review each word based on your performance, ensuring long-term retention.
Audio Learning
Every word comes with native pronunciation. Hear the word, hear it used in context. Audio playback helps cement pronunciation and improves listening comprehension.
Detailed Analytics
See exactly how you're progressing. Track retention rates, learning stability, and more. The 30-day forecast shows what's coming up so you can plan your study sessions.
Cloud Sync & Offline
Your vocabulary database lives on your device. Study anywhere without internet. When you're back online, cloud sync keeps your progress updated across all devices.
For Every Level of Learner
New to a Language?
Start fresh with curated courses. Learn the most common words first with frequency-ordered vocabulary.
Already Know Some Vocabulary?
Use Auto-Learn to skip words you know. Jump straight into learning new content without wading through familiar words.
Need a Break?
Vacation mode pauses your schedule and automatically adjusts all review dates. Come back refreshed without overdue cards.
iOS
Available
Android
Available
Windows
Coming Soon
macOS
Coming Soon
