Last updated 08-09-2026
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Heuristica
Heuristica turns one source into many study formats for research and coursework. Drop in a PDF, YouTube link, podcast, or article and it reshapes the material into concept maps, flashcards, quizzes, summaries, and structured study notes. You can also chat with documents using models such as GPT-5.4, Claude Sonnet 4.6, Gemini 2.5 Pro, and Qwen 3 without writing prompts from scratch.
Most study apps give you a chat box and a wall of text. Heuristica focuses on cross-format conversion: build a concept map, then branch it into flashcards with spaced repetition or a multiple-choice quiz in a few clicks. The trade-off is that it is a learning workspace, not a citation manager, and the free tier caps you at three saved concept maps on GPT-5.4 mini.
Students, teachers, and researchers use Heuristica for literature reviews, PhD topic shaping, and classroom concept mapping. The site cites imports from PubMed, arXiv, Semantic Scholar, and YouTube, plus sharing decks with classmates. Over 75,000 learners are listed on the homepage, and the Professional plan unlocks hundreds of saved maps and premium models for $5 per month billed annually.
Import PDFs, YouTube videos, websites, PubMed, and arXiv sources into one workspace
Convert concept maps into flashcards, quizzes, study notes, or mind maps without re-prompting
Free tier includes GPT-5.4 mini with up to 3 saved concept maps
Professional plan at $5 per month (billed $59.99 yearly) unlocks GPT-5.4, Claude Sonnet 4.6, and Gemini 2.5 Pro
Spaced repetition flashcards and multi-format quizzes for active recall practice
AI chat with custom prompts that can be saved back into study materials
Converts one imported source into concept maps, flashcards, quizzes, and notes
Supports academic imports from PubMed, arXiv, and Semantic Scholar
Multiple premium AI models available on the paid plan
Spaced repetition built into flashcard decks
Free plan limits saved concept maps to three
Professional features require a paid subscription
Not designed as a full citation or reference manager
What does Heuristica do?
Heuristica is a research and study platform that turns PDFs, YouTube links, websites, and topics into concept maps, flashcards, quizzes, summaries, and study notes. It also lets you chat with your documents using models like GPT-5.4 and Claude.
Is Heuristica free?
Heuristica offers a free plan with GPT-5.4 mini and up to 3 saved concept maps with limited functionality. The Professional plan costs $5 per month when billed annually at $59.99 per year and unlocks premium models and hundreds of saved materials.
Which AI models does Heuristica support?
Heuristica free users get GPT-5.4 mini. Professional subscribers can use GPT-5.4, GPT-5.4 mini, Claude 4.5 Haiku, Claude Sonnet 4.6, Gemini 2.5 Pro, and Qwen 3 inside the same study workspace.
What sources can Heuristica import?
Heuristica imports PDFs, YouTube videos, websites, podcasts, and academic sources including PubMed and arXiv. It generates transcripts, summaries, and study materials from each source in one place.
Can Heuristica make flashcards from videos?
Yes. Heuristica can generate YouTube transcripts and summaries, then turn that content into flashcards with spaced repetition or quizzes. You can also convert concept maps directly into flashcard decks.
Does Heuristica support collaboration?
Heuristica Professional includes collaboration and sharing features for flashcard decks and quizzes with classmates or colleagues. Shared materials stay linked to the original imported sources.
How do I cancel a Heuristica subscription?
Heuristica subscriptions can be canceled anytime through the Subscription button in the site header or footer. You keep access through the current monthly or annual billing period without a long-term contract.