Chrome Extension
Seal words without leaving the page
Right-click any word, or click the floating SEAL logo that appears near your selection. Your word is sealed in seconds — with full context.
Capture vocabulary in the wild, review at the perfect moment, and build a lasting memory — one sealed word at a time.
From stumbling on an unfamiliar word to owning it forever.
Right-click any word on the web or add it manually in the app. SEAL grabs the context sentence automatically.
AI fills in the definition, translation, and pronunciation instantly. No tab-switching, no copy-pasting.
Get notified at 3h, 6h, and 9 days. The 3–6–9 Power Loop moves words from short-term to long-term memory.
Chrome extension, mobile app, or manual entry. Wherever you read, SEAL is ready to capture.
Science-backed 3–6–9 day review cycle. Review at exactly the right moment before forgetting kicks in.
Gemini AI provides contextual definitions and translations in your language — no generic dictionary entries.
Hear every word spoken clearly. Build the right sound in your head from the start.
Track streaks, progress, and mastery over time. Know your learning at a glance.
Tag words by category — Business, Tech, Daily, Academic — and review by domain.
"I've tried every vocabulary app out there. SEAL is the only one where I actually remember the words a month later. The context sentence makes all the difference."
"The Chrome extension is a game changer. I read the news and seal words in one click. By the next day I already remember them."
"Clean, fast, no fluff. The 3–6–9 notifications feel perfectly timed — not spammy. It's the first vocab app that respects my attention."
3-day free trial with full access, then choose your plan.
Join thousands of learners building lasting vocabulary.