# Vocabulary Builder by Lockcard — Learn words in context & AI > Vocabulary builder app for learning words in context. (iPhone/iPad app by xinyi fu.) - Source: https://appshunter.io/ios/app/vocabulary-builder-by-lockcard/id1534553106 (this page in markdown: same URL + `.md`) - Developer: [xinyi fu](https://appshunter.io/developer/1534553108) - Category: Education, Productivity - Price: Free with in-app purchases - Rating: 4.70/5 from 154 App Store ratings · 59 written reviews indexed - Age rating: 4+ - Requires: iOS 15.5 · 114 MB - Languages: American English, French (France), Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan), Vietnamese - Released: 2021-03-15 - Data updated: 2026-07-29 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/vocabulary-builder-by-lockcard/id1534553106/reviews.md ## What is Vocabulary Builder by Lockcard? 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/ ## Key features - Learn words in real context - Expand vocabulary - Improve expression - Daily word learning - Discover new words ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | 按月订阅 | $5.99 | per month | | 按年订阅 | $39.99 | per year | | 按季度订阅 | $14.99 | per 3 months | | Quarterly | $19.99 | per 3 months | | Yearly | $61.99 | per year | | Monthly | $7.49 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | 终身会员 | $149.00 | one-time | | 终身会员 | $79.99 | one-time | ## What do users think of Vocabulary Builder by Lockcard? Overall sentiment: mixed **Pros** - 👍 User-friendly interface - 💡 Innovative notification flashcards - 🚀 Efficient vocabulary building - ✨ Beautifully designed - ✅ Simple and minimalist - 📚 Great for learning new words - 💯 Perfect app with many functions - 🌟 Useful functional widgets - 🆓 Free without hidden fees - 🧠 Helps reinforce word usage - 🎯 Great for ESL learners - 🚀 Quick notifications - 📖 Useful for writers - 💯 Highly recommended **Cons** - 🐛 App crashes frequently - 🐌 Slow opening times - ❌ No sync with web plugin - 🔔 Notifications not working - 💸 Subscription fee for definitions - 🤷‍♀️ Widget issues - 📉 Progress bar stuck - ❓ Shallow and lacking features - 🚫 Cannot add own words - 📉 Wordles are a day behind - 🔒 Paid subscription issues - 🚫 Login button not working **Commonly reported bugs** - App crashes on opening - App crashes when turning on notifications - Notifications not working - Progress bar for notifications stuck at 10% - Words looked up on computer don't appear on phone - Widget not working - Login button not working after payment - Wordles are a day behind - App crashes after last update - Cannot add new words after update **Most requested features** - Add Traditional Chinese language - Fix sync with Chrome plugin - Make testing within the app an option - Add option to upload own word lists - Add image import from internet - Add Chinese > English dictionary - Add Chinese word notifications - Add import/export word function - Add more notification times - Analyze and predict memorization progress - Add example sentences in dictionary - Add Chinese version of the app - Add ability to add own notes on flashcards ## Recent user reviews (10 of 59) All indexed reviews: https://appshunter.io/ios/app/vocabulary-builder-by-lockcard/id1534553106/reviews.md ### 1/5 — App not accessible after paid *2025-06-03, version 3.2.1* Don't waste your money! I paid for a monthly subscription, but when I want to log in, the button does not work; only the sign-up button works! I asked for a refund, but so far, no one has responded! ### 2/5 — Very slow opening and no sync possible with webs *2024-12-26, version 3.2.1* It crashes every time opening the app so I cant review nor add new words. Also I tried syncing the list on chrome plug in but it doesn’t work so I can access the list only on iPhone. Could you fix these problems? Other than that, I like its different types of widget function and also that I can make my own vocab cards. ### 3/5 — Bugs and crushes *2024-09-22, version 3.2.1* Before the last patch, app was working all fine but know it crashes a lot, and takes ages for app to turn on and get the main screen!! ### 3/5 — Notifications doesn’t work *2024-07-09, version 3.2* Great but the general feature doesn’t work - notifications doesn’t work. I turn on notifications settings everywhere, but no notifications ### 5/5 — No more push notification?? *2024-06-25* My phone is currently 17.5.1 And since quite a while ago the app's "notification per day" won't work anymore. I didn't receive any notification at all. Is it because this is a pay function now? Please advise. I tried the free trial (7 days) version...but too no avail. Want to make sure it's not a bug issue before I pay for the app. Please advice. Thank you. **Developer response:** Hi LL2010, thank you for the detailed message, and sorry for the confusion. Push notifications are still supported. In newer versions, notification content and learning progress can be customized, so please go to the Learn Later tab and configure them under Notification Flashcard. Also, please make sure notifications are enabled in iOS Settings and that you’re using the latest version of the app. If you still don’t receive notifications after setup, please contact us through the app’s support/contact option with your iOS version and device model so we can investigate further. ### 2/5 — Shallow *2024-06-13* I would have loved to give it 5 stars because I believe there’s more to the app but, it seems shallow and lacking and no elaborate tutorial anywhere to prove me wrong **Developer response:** Hi 7zsa7, thank you for the thoughtful feedback. We’ve improved the app since then, and you can now find tutorials in Settings to better understand the main features and workflow. We’re also continuing to add deeper learning features, including the ability to turn saved words into an AI podcast for listening and reviewing during your commute or daily routine. Thanks again for the feedback. We’ll keep improving the onboarding and tutorial experience. ### 2/5 — Shallow *2024-06-06* I would have loved to give it 5 stars because I believe there’s more to the app but, it seems shallow and lacking and no elaborate tutorial anywhere to prove me wrong ### 4/5 — 很棒的軟體 *2024-04-21, version 3.1* 用來被單字很實用，但希望有繁體中文 另外通知時的小測驗，一直沒辦法讓進度條往前，一直停留在10%，想詢問是否有什麼Bug Please fix that the words I looked up in my computer don’t appear in my phone. And the notifications don’t add up progress line. ### 5/5 — Great but with room for improvement *2024-03-29, version 3.1* I really like the app but please make an option to test yourself within the app not through notifications. It will make things sooooooooo much easier than having to flip from the notification center to the app and then lock your screen to go back to notification center. I would really like to continue using this app but that will become a dealbreaker at some point as it’s discouraging me from learning. Thanks ### 1/5 — Had major potential — Now has Subscription Fee *2024-01-27* This was a good app, it had potential and was great for logging words hard to remember. Now they want you to pay $2.99 a month just to store word definitions. Sad thing is, the app doesn’t even work fully. Trying to turn on notifications for certain words crashes the app. I suggest to use WordNote Dictionary instead. **Developer response:** Hi LivingXen, thank you for the honest feedback. We’re sorry the subscription change and notification issue caused frustration. The subscription helps us continue maintaining the app, improving sync and review features, and supporting ongoing development. That said, the app should still work reliably, and crashes when setting notifications are definitely not expected. We’ve made stability and notification improvements in newer versions, so please update to the latest version and try again. If you still run into crashes, please contact us through the app’s support/contact option with your device model and iOS version, and we’ll look into it. We appreciate that you saw potential in the app, and we’ll keep working to make it worth using. ## Frequently asked questions about Vocabulary Builder by Lockcard ### What does Lockcard do? Lockcard is a vocabulary builder app designed to help users learn new words by encountering them in real-world contexts. It aims to make users more eloquent and confident in their self-expression by expanding their word knowledge. ### How does Lockcard help me learn words? The app focuses on learning words as they appear in various contexts, allowing for deeper understanding and retention. Users can search, save, and review words, integrating them into their daily vocabulary. ### Is Lockcard free to use? The application is free to download and use, with options for in-app purchases. This allows users to access core features for free while offering additional value through optional purchases. ### Who is Lockcard for? This app is beneficial for anyone looking to enhance their vocabulary and communication skills, including high school students, international university students, and professionals who want to express themselves more effectively. ### What are the benefits of using Lockcard? Users can expect to become more eloquent and confident in expressing themselves, discover new words and worlds through contextual learning, and integrate vocabulary building into their daily routines, even with a busy schedule. ## Version history (last 5 releases) ### 3.2.11 — 2026-07-26 Bug Fixed Fixed an issue that caused word lookups to fail. Definitions, examples, and AI explanations now load correctly again. New Features 1. Word Journey [Learning Timeline]: Every saved word now has its own Journey. See where it came from, when it was saved, what notes were added, and how it has been reviewed. 2. Translation Controls [Show or Hide Translations]: New translation controls let you choose whether translations appear on word detail pages. ### 3.2.10 — 2026-06-22 New Features 1. Word Journey [Learning Timeline]: Every saved word now has its own Journey. See where it came from, when it was saved, what notes were added, and how it has been reviewed. 2. Translation Controls [Show or Hide Translations]: New translation controls let you choose whether translations appear on word detail pages. ### 3.2.9 — 2026-05-31 Bug Fixes - Fix the issue where notifications fail to arrive in some cases. - Optimize widget performance and fix the issue where widgets show no content after first install. Feedback You can submit feedback directly in the in-app **Feedback** section; also feel free to email us: shirlxfu@gmail.com, or contact us Wechat: shirlxfu. ### 3.2.8 — 2026-05-18 New Features Personalized AI Word Explanations - [Personalization]: New Personalization settings page. Configure your proficiency level, learning goal, age group, and profession to receive AI-generated word explanations tailored to your profile. - [Custom Descriptions]: Premium users can edit custom descriptions for each personalization option, allowing the AI to better understand your specific learning needs. Enhanced Multilingual Support - [Multilingual Search]: Added a multilingual selection button at the top of the search text field, supporting more language pairs for word lookup. - [Multilingual Onboarding]: The onboarding flow now fully supports multiple languages with adaptive layout improvements. - [Multilingual Pronunciation]: Widgets now support multilingual pronunciation; tapping phonetics in search detail also plays the corresponding language's pronunciation. - [British Accent]: Added en-GB British accent support. Improvements LLM Search Experience - Refined LLM search prompts for improved accuracy and relevance of generated content. - Fixed parsing issues where LLM search results occasionally contained no translation content. Bug Fixes Critical Fixes - Fixed layout adaptation issues on the onboarding page across different devices. - Improved app stability with multiple known issues resolved. Feedback You can submit feedback directly in the in-app Feedback section; also feel free to email us: shirlxfu@gmail.com, or contact us on Wechat: shirlxfu. ### 3.2.7 — 2026-01-13 New Features AI Podcast Generator - [AI Podcast Generation]: Transform words into learning podcasts with AI-generated dialogues. Create engaging English learning content through natural conversations between hosts. Create Your Own MCP Server - [MCP Server]: Create your own MCP Server to save words from Cursor or Claude Desktop directly to LockCard. Everything syncs seamlessly to the cloud for a smooth workflow. Server Infrastructure Upgrade - [Performance Enhancement]: Faster sync, better reliability, and enhanced security. Your learning data is now backed by enterprise-grade infrastructure. Lifetime Membership - [Lifetime Access]: One-time purchase, lifetime use. New Feedback Board - [Feedback]: New in-app Feedback section where you can request features and report bugs. Bug Fixes - Fixed an issue where word pronunciation had no sound when the phone was in vibrate/silent mode. Feedback You can submit feedback directly in the in-app **Feedback** section; also feel free to email us: shirlxfu@gmail.com, or contact us on Instagram:LockcardApp or on Wechat: shirlxfu. ## Apps similar to Vocabulary Builder by Lockcard | App | Rating | Price | Category | | --- | --- | --- | --- | | [WordPal - Vocabulary Builder](https://appshunter.io/ios/app/wordpal-vocabulary-builder/id1418579583) | 4.7 (9,050) | Free | Education | | [Vocabulary - Learn words daily](https://appshunter.io/ios/app/vocabulary-learn-words-daily/id1084540807) | 4.8 (210,031) | Free | Education | | [504 - Vocabulary Builder](https://appshunter.io/ios/app/504-vocabulary-builder/id1452101398) | 4.8 (4,603) | Free | Education | | [Word of the Day・Vocabulary](https://appshunter.io/ios/app/word-of-the-dayvocabulary/id987136347) | 4.7 (38,327) | Free | Education | | [English Cards: Словарный запас](https://appshunter.io/ios/app/english-cards/id1658981786) | 4.5 (61) | Free | Education | | [Learn English - Vocabulary](https://appshunter.io/ios/app/learn-english-vocabulary/id6462422087) | 4.7 (36) | Free | Education | ## Related topics [wozi](https://appshunter.io/ios/topics/wozi) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-29.*