Bulb: Lexicon & Language App

EPUB Reader & AI Proofreader

Free · In-App Purchases

Turn any EPUB book and website into language lessons! Tap words for translation, build vocabulary automatically. AI writing coach for learners. Learn languages by reading real books and browsing websites with AI-powered translation and writing feedback. Bulb combines EPUB reading with AI writing coaching for language learners. Import any EPUB book, browse websites with built-in translation, build contextual vocabulary, and receive detailed AI essay feedback. Designed for professionals, students, and anyone learning through authentic content. === AI WRITING COACH === INSTANT AI ESSAY FEEDBACK Get detailed grammar, style, and vocabulary analysis for your writing. Identify specific error patterns with visual charts. Receive personalized suggestions to improve your language skills. Track your writing progress over time. READ ANY EPUB BOOK Import your own EPUB books and read in your target language. Tap any word for instant translation and pronunciation. Double-tap sentences for contextual understanding. Create bookmarks and highlights as you read. SMART VOCABULARY BUILDING Words are automatically saved to flashcard sets as you read. Practice with spaced repetition algorithms. Generate contextual sentences for each word. Build vocabulary naturally through immersive reading. === BROWSE THE WEB AND LEARN === TRANSLATE ANY WEBSITE Read articles in your target language with built-in translation. Tap words for instant definitions. Save interesting vocabulary while browsing. Practice comprehension with real-world content. CONTEXTUAL SENTENCE PRACTICE Generate practice sentences for saved words. Translate between your native and target language. Get AI feedback on your translations. Learn grammar rules in context. === SUPPORTED LANGUAGES === English, Spanish, French, German, Chinese, Japanese, Italian, Portuguese, Russian, Korean, Arabic, Serbian === WHAT MAKES BULB UNIQUE === AI WRITING COACH Advanced AI essay analysis for language learners. Get detailed feedback on grammar, vocabulary, and style mistakes. REAL BOOK READING Learn by reading actual EPUB books, not artificial exercises. Import any book from your library. CONTEXTUAL VOCABULARY Build vocabulary from words you encounter while reading. Learn in context, not isolation. SMART FLASHCARDS Automatically generated flashcard sets from your reading. Spaced repetition keeps words in long-term memory. ICLOUD SYNC Your vocabulary syncs automatically across all your iOS devices. === DESIGNED FOR === • Business professionals improving writing skills • Students preparing for language exams • Book lovers learning new languages • Anyone who prefers authentic content over artificial lessons === PREMIUM FEATURES === • Enhanced AI essay feedback with detailed error analysis • Unlimited vocabulary practice and flashcard generation • Priority customer support • Advanced writing improvement suggestions Requires internet connection for AI features and translation. Privacy Policy: https://thebulb.app/privacy Terms of Service: https://thebulb.app/terms DOWNLOAD BULB AND TRANSFORM YOUR READING INTO LEARNING

Ratings & Reviews

  • This app has not received enough ratings or reviews to display an overview.

Updated news sources on the home screen with more relevant and reliable websites for better language learning experience

Version 1.0.2

The developer, Danis Gaiazov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary based, for example, on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Provider
    • Danis Gaiazov
  • Size
    • 34.9 MB
  • Category
    • Education
  • Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
  • Languages
    English and 11 more
    • English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Russian, Serbian, Simplified Chinese, Spanish
  • Age Rating
    16+
  • In-App Purchases
    Yes
  • Copyright
    • © Danis Gaiazov
  • Privacy Policy

    • You Might Also Like