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About Lockcard
What is Lockcard?
Lockcard is a vocabulary app for English learners that turns passive word knowledge into active fluency. Instead of memorizing random lists, you save words from YouTube subtitles, web articles, and your own notes — with the original context preserved.
The problem it solves
Most language apps teach vocabulary in isolation, making it hard to recall words in real conversations. Lockcard solves that by capturing words from the content you already consume. When you encounter an unfamiliar word, click it — the video pauses, a definition appears, and the word is saved with its full sentence context.
Who it is for
Lockcard is for intermediate to advanced English learners (especially those learning from English-to-Chinese) who want to move beyond flashcards and build vocabulary naturally. It is not ideal for absolute beginners who need structured grammar lessons.
Real use cases
A learner watching a TED Talk on YouTube can click any word in the subtitles — the video pauses, the definition shows, and the word is saved alongside the exact subtitle sentence. Later, they practice via AI-generated podcasts, notification flashcards, or home screen widgets. Users can also customize explanations by setting their level, goal, age group, and profession so AI answers match personal needs.
Key features
- YouTube subtitle integration — Click any word in video subtitles; video auto-pauses and shows instant definition.
- Context-aware saving — Save words with original sentence context from articles, videos, or personal notes.
- AI Tutor for every word — Ask follow-up questions, get simple explanations, examples, and word comparisons.
- Multi-language support — Learn in 10+ languages with explanations in your chosen language (e.g., English → Chinese).
- Interactive home screen widgets — Practice vocabulary from your home screen with multiple practice modes.
- Notification flashcards — Micro-learning through spaced-repetition notifications on iOS.
- Cloud sync — Vocabulary, notes, and progress sync instantly across Chrome extension and iOS app.
SaaSpartout Score
7.0
/10
Editorial score from our review methodology — not user ratings.
Lockcard Pricing
Lockcard pricing: Free to start · from $39.99/year. Billing model: Freemium.
Free Plan
Free to start with a 7-day trial (no credit card required). Includes core features: YouTube subtitle integration, context-aware saving, and limited practice modes.
Yearly Plan
$39.99/year. Unlocks full access including unlimited AI Tutor queries, all practice modes (AI-generated podcasts, interactive widgets, notification flashcards), and complete cloud sync across devices.
Exclusive deal via SaaSpartout
Get the deal →Frequently asked questions
Is Lockcard free?
Lockcard is free to start with a 7-day trial that requires no credit card. After the trial, the paid plan starts at $39.99 per year.
How does Lockcard work?
Lockcard captures vocabulary from YouTube subtitles, web articles, and personal notes. When you click a word, the video pauses showing an instant definition, and the word is saved with its original sentence context for later review via flashcards, widgets, or AI-generated podcasts.
What are the best alternatives to Lockcard?
Popular alternatives include Anki for spaced repetition, Quizlet for flashcard-based learning, and Readlang for in-context reading. Lockcard stands out for its YouTube subtitle integration and AI tutor for contextual learning.
Who is Lockcard best for?
Lockcard is best for intermediate to advanced English learners, especially those learning from English to Chinese, who want to build fluency naturally from real content like YouTube, articles, and notes. It is not ideal for absolute beginners needing structured grammar lessons.
What are the key limitations of Lockcard?
Lockcard focuses on vocabulary building from authentic content and may not suit learners who prefer structured grammar courses. The free plan is limited after the 7-day trial, and some features like AI-generated podcasts require a paid subscription.
Does Lockcard include a free trial?
Yes, Lockcard offers a 7-day free trial with no credit card required. After the trial, you need a paid plan ($39.99/year) to continue full access.
