Vocabulary Builder by Lockcard
Learn words in context & AI
| Revenue % | ||||
|---|---|---|---|---|
| Monthly | 175 | $7.04 – $11.24 | ||
| 3 months | 175 | $18.11 – $28.94 | ||
| Annual | 175 | $56.57 – $96.55 | ||
| 3 months · 7 days trial | 175 | $13.73 – $22.50 | ||
| Annual · 7 days trial | 175 | $36.22 – $61.08 | ||
| Monthly · 7 days trial | 175 | $5.49 – $8.54 | ||
| One-time purchase | 175 | $72.46 – $122.17 | ||
| One-time purchase | 175 | $137.36 – $225.32 |
| Revenue % | Top products | |
|---|---|---|
| China | ||
| United States | ||
| Canada | ||
| United Kingdom | ||
| Australia | ||
| India | ||
| Taiwan | ||
| Vietnam | ||
| Hong Kong | ||
| Germany |
Description
Lockcard is a vocabulary builder that helps you learn words in context across languages from real content such as YouTube videos, articles, PDFs, and any web pages you read or watch.
Instead of memorizing isolated word lists or using traditional flashcards alone, Lockcard lets you build vocabulary from real-world context and turn everyday content into long-term memory.
CAPTURE FROM REAL CONTENT
Turn what you read and watch into learning material.
Save vocabulary from YouTube, articles, PDFs, and web pages
Highlight words with full sentence context and source link
One-click capture from any browsing or learning environment
Sync all saved words automatically to your mobile app
LEARN IN CONTEXT
Understand how words are actually used.
Keep original sentences and real usage context
Track where and how you encountered each word
Build vocabulary from real-world exposure, not dictionary definitions
Strengthen understanding through repeated encounters
PERSONALIZED LEARNING SYSTEM
Turn vocabulary into long-term memory.
Flashcards (fill-in, flip, multiple choice)
Spaced repetition via notifications and widgets
Passive learning through word podcasts
Lightweight daily review built into your routine
AI VOCABULARY TUTOR
Learn words in a personalized way.
AI explanations tailored to your learning profile
Chat with AI about specific words and usage
Generate personalized examples and explanations
Learn vocabulary through interaction, not memorization
BUILT FOR REAL LEARNERS
Lockcard connects real content with real learning.
It transforms everyday exposure into a personalized vocabulary system—helping you move from encountering words to actually using them.
What our users say about Lockcard:
"Ya'll are amazing. Ever since I started using Lockcard, it's become something I use daily" — James (15y high school student)
"Super helpful especially with my busy schedule" — Peng (International Uni student)
"The simplicity and beautiful designs make it such a delight to use" — Charlotte (works @Duolingo)
"One of the most impressive apps I've used in a long time!" — Jordan
By downloading this app, you agree to Apple’s standard End User License Agreement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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