Read difficult material without breaking your reading flow.
Readholic is a PDF and EPUB reader built to help you understand and retain what you read — textbooks, research papers, technical books, classics. When a passage is unclear, select it and tap Explain. Ask follow-up questions, turn the same material into flashcards or quizzes, and review it with spaced repetition until it sticks.
NEW IN 1.1
• Your own AI key: a one-time purchase lets you use your own API key from OpenAI, Anthropic, Google Gemini (where available) or DeepSeek for AI explanations, follow-ups and flashcards. No AI service is included; your provider bills you for its use. Your key is stored only on your device, and these requests don't count toward Readholic's plan limits (fair-use limits apply).
• Nine reading themes: White, Linen, Sepia, Sage, Mist, Contrast, Dusk, Dark and Midnight. Figures and images adapt to the theme.
• New reading fonts: Literata, EB Garamond, IM Fell English, Atkinson Hyperlegible Next, Lexend and OpenDyslexic. OpenDyslexic and Atkinson Hyperlegible Next can help readers with dyslexia or low vision.
• Choose the highlight color that marks the passages AI has explained for you.
• A redesigned AI Explanation sheet with a cleaner, margin-note look.
READ AND UNDERSTAND
• Read your PDF and EPUB books and documents in one place.
• Select a difficult passage and get an AI explanation without leaving the page.
• Ask follow-up questions while the original text stays in front of you.
• Every explanation is saved with its highlight, right where you found it.
• Works with real academic material, including mathematical notation.
FIND SOMETHING TO READ
• Import your own files, or download public-domain classics from Project Gutenberg.
• Get free open textbooks from OpenStax, converted for comfortable reading.
• Read research papers from arXiv as clean, reflowable text.
TURN READING INTO STUDY
• Generate flashcards from a selected passage or a whole chapter.
• Quiz yourself with multiple choice, fill-in-the-blank, and written answers graded by AI.
• Review with spaced repetition — due cards wait for you in the Study tab.
LEARNING MEMORY
Readholic keeps a short summary of the concepts you have studied so future explanations can build on what you already know instead of starting from zero. You stay in control: view, disable, or reset it in Settings at any time.
LEARN WITH THE COMMUNITY
• Discover flashcard decks shared by other learners.
• Search by book, subject, or topic, and filter by language.
• Download decks to study in Readholic, rate the useful ones, and thank their creators.
• Share your own decks. Only the cards you publish become public — never your books, notes, or reading history.
YOUR LANGUAGE, YOUR CHOICE
• The app speaks English, Spanish, French, German, Portuguese, Chinese (Simplified and Traditional), Japanese, Korean, and Arabic.
• Choose the language of explanations and flashcards independently of the book: read an English textbook, learn in Spanish, Japanese, or Arabic.
Readholic is for students, professionals, researchers, and lifelong learners who want more than summaries.
Read → Explain → Understand → Flashcards → Quiz → Review → Remember
You can start free. Some AI and study features require Readholic Pro (auto-renewing subscription). Using your own AI key requires a separate one-time purchase.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://paroaria.ai/readholic/privacy/
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