# Facts & Vocab Builder -Defy AI — Turn curiosity into clarity > AI-powered app for learning facts, building vocabulary, and understanding complex ideas. (iPhone/iPad app by Youssef Ismaili.) - Source: https://appshunter.io/ios/app/facts-and-vocab-builder-defy-ai/id6743989598 (this page in markdown: same URL + `.md`) - Developer: [Youssef Ismaili](https://appshunter.io/developer/1696488085) - Category: Education, Reference - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17 · 49 MB - Languages: American English - Released: 2025-06-14 - Data updated: 2026-06-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/facts-and-vocab-builder-defy-ai/id6743989598/reviews.md ## What is Facts & Vocab Builder? Build your vocabulary, learn new facts and get smarter with Defy AI. Discover facts, expand your vocabulary, and explore knowledge—all in one place. Defy Ai is your personal AI-powered learning companion. Whether you’re curious about a topic, exploring new ideas, or looking up unfamiliar terms, Defy helps you learn quickly, clearly, and contextually. Key Features: • Learn new facts through clear, AI-powered summaries • Build your vocabulary with contextual definitions and pronunciation • Understand complex ideas in simple terms • Save what you discover to revisit offline • Explore related topics and deepen your understanding • Share beautiful knowledge cards • Use text-to-speech to hear how vocabulary is pronounced Why Choose Defy Ai? • Works offline: perfect for learning anywhere • Smart summaries powered by AI • Clean design, distraction-free • Built-in pronunciation and text-to-speech • Your own saved knowledge hub • Supports multiple languages and learning styles In a world full of information overload, Defy helps you focus on what matters. It’s not just about reading definitions—it’s about understanding, remembering, and connecting ideas that stick. Whether you’re studying, reading, researching, or just exploring—Defy AI helps you learn more, faster. Download Defy Ai today and turn facts and vocabulary into lasting knowledge. Terms of Use: https://www.theblackholecompany.com/termsConditions.html ## Key features - AI-powered fact summaries - Contextual vocabulary definitions - Pronunciation with text-to-speech - Offline access to saved content - Exploration of related topics - Shareable knowledge cards ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro | $2.99 | per 7 days | | Pro | $3.99 | per month | | Pro | $29.99 | per year | | Pro | $1.99 | per month | | Pro | $0.99 | per 7 days | | Pro | $19.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlimited access | $49.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/facts-and-vocab-builder-defy-ai/id6743989598/reviews.md ### 5/5 — Truly unique! *2025-10-27* This app is very helpful for anyone trying to expand their vocabulary and wants something more feature-rich than a dictionary. It feels like the perfect fit for student and lifelong scholars. App is clean and feels nice to use. ### 5/5 — Great App *2025-10-24* Great app to learn and use new vocabulary ## Frequently asked questions about Facts & Vocab Builder ### What is Defy AI? Defy AI is an AI-powered learning companion designed to help you build vocabulary, learn new facts, and understand complex ideas. It provides clear summaries, contextual definitions, and pronunciation guides. ### Can I use Defy AI offline? Yes, Defy AI works offline. You can save facts and vocabulary you discover to revisit them later without an internet connection, making it perfect for learning anywhere. ### How does Defy AI help with vocabulary? Defy AI builds your vocabulary by providing contextual definitions for unfamiliar terms and offering pronunciation guides through text-to-speech functionality. This helps you understand and remember new words. ### What are the subscription options for Defy AI? Defy AI offers several Pro subscription plans, including weekly options at $0.99 and $2.99 (with a 3-day free trial), monthly options at $1.99 and $3.99, and an annual plan for $19.99. These plans unlock premium features. ### Is Defy AI suitable for all ages? Defy AI has an age rating of 4+, making it suitable for a wide range of users. Its educational content and features are designed to be accessible and beneficial for learners of various ages. ### How often is Defy AI updated? The latest version of Defy AI is 1.1.0, which was last updated on October 20, 2025. Updates typically bring new features, improvements, and bug fixes to enhance the learning experience. ### Does Defy AI have ads? No, Defy AI is ad-free. The app focuses on providing a distraction-free learning environment, allowing users to concentrate on acquiring knowledge and building vocabulary. ### What devices support Defy AI? Defy AI is available on iPhones and iPads, making it accessible to users within the Apple ecosystem. Its design is optimized for these mobile devices. ## Version history (last 4 releases) ### 1.1.0 — 2025-10-20 Major Update: Smarter Learning & Organization • iOS 26 UI adaptation • Learning Mode & Collections: Group your vocabulary by topic, book, or article for focused study. • Smart Extraction: Capture and define text directly from images and PDFs. • Advanced Annotations: Highlight key phrases and get contextual explanations instantly. • Widgets: Track your progress from the home screen. • Improved Design & Performance: Refined interface, smoother navigation, and enhanced stability. • Bug fixes Study smarter with Defy 1.1.0 — your all-in-one learning companion. ### 1.0.2 — 2025-07-07 Bug fixes and performance improvements. ### 1.0.1 — 2025-06-18 Thank you for using Defy! In version 1.0.1, we’ve made the app smoother and better: • Fixed bugs and improved overall performance • Enhanced the design of the input bar • Refined the authentication page for a better login experience ### 1.0 — 2025-06-14 No release notes. ## Apps similar to Facts & Vocab Builder | App | Rating | Price | Category | | --- | --- | --- | --- | | [Vocablitz - Vocabulary Builder](https://appshunter.io/ios/app/vocablitz-vocabulary-builder/id6743963334) | 4.5 (6) | Free | Education | | [Creative Writing: Unprompted](https://appshunter.io/ios/app/creative-writing-unprompted/id6746424858) | 5.0 (3) | Free | Education | | [FlashRead-improve efficiency](https://appshunter.io/ios/app/flashread-improve-efficiency/id6745725776) | — | Free | Education | | [Speed Reading & Memory Trainer](https://appshunter.io/ios/app/speed-reading-and-memory-trainer/id6737622922) | 4.8 (179) | Free | Education | | [bitrig](https://appshunter.io/ios/app/bitrig/id6747835910) | 3.3 (56) | Free | Education | | [Hala: Speak English with AI](https://appshunter.io/ios/app/hala-speak-english-with-ai/id6744363860) | 4.8 (314) | Free | Education | ## More apps by Youssef Ismaili - [Bookmark URL Saver - Trace](https://appshunter.io/ios/app/bookmark-url-saver-trace/id6477563940) - [Compressor & HEIC Converter](https://appshunter.io/ios/app/compressor-and-heic-converter/id6752115419) - [Currency Converter & Tracker](https://appshunter.io/ios/app/currency-converter-and-tracker/id6753331877) - [Phase - Sleep Schedule Reset](https://appshunter.io/ios/app/phase-sleep-schedule-reset/id6759457939) - [Tally - Daily Time Tracker](https://appshunter.io/ios/app/tally-daily-time-tracker/id6760643996) All apps by Youssef Ismaili: https://appshunter.io/developer/1696488085 --- *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 2026-06-01.*