TLDR
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Papel is an iOS app combining a TikTok-style paper discovery feed, on-device RAG chat over full PDFs, and gamified XP quizzes for researchers.
Key Takeaways
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Discovery feed uses vector-similarity recommendations ranked by interests, trending topics, freshness, and community engagement; Latest mode available.
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AI chat runs fully on-device via Apple Intelligence or local MLX models – no data leaves the device.
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RAG pipeline operates over full PDF text, not abstracts, enabling grounded answers to paper-specific questions.
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Gamification layer awards XP and streaks through 3-question AI-generated quizzes per paper, with academic ranks from Undergrad to Nobel Laureate.
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Community features include likes, comments, direct messages, and academic profile badges tied to rank.
Hacker News Comment Review
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