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PaperFren

Plans

Start free. Keep your research organized.

Every plan includes public explanations, sources, cards, and quizzes. Start with one free project and three watched questions and a monthly email Brief. Researcher adds room and weekly delivery. Pro connects recorded claim updates to studies saved in your projects.

Brief email delivery is currently unavailable on all plans. Watches and the Brief remain available in the app.

MonthlyAnnual · lower monthly equivalent

Free

Read the evidence. Follow a few threads.

$0

No card needed

  • Read every discovery and concept page, with sources
  • Search papers, ask grounded questions, and compare studies on a claim
  • Save up to 25 papers and upload 3 private PDFs
  • 1 research project and 3 watched questions within supported coverage, no card needed
  • Follow 3 topics and 5 concepts
  • Monthly PaperFren Brief email, when there are updates
Create a free account

For ongoing research

Researcher

Follow your own questions and organize what answers them.

$17 / month

or $168 a year

  • 5 Research Radar monitors — enough for the questions you are actively living with
  • Personalized Discover, ranked against what you follow and what you saved
  • Weekly PaperFren Brief of evidence changes in what you follow
  • Projects: one question, the studies that bear on it, a comparison grid, APA/BibTeX/RIS, a read-only link
  • Save 500 papers and upload 40 private PDFs, readable by Ask PaperFren
  • Follow 40 topics and 80 concepts
  • Ask 1,000 grounded questions a month
Sign up and start a 14-day trial

Card required at checkout. Cancel during the trial and you won't be charged.

Pro

PaperFren watches what moves underneath your own work.

$29 / month

or $276 a year

  • Research impact alerts: when a claim moves, Pro names which of your own studies sit under it, and in which project
  • The Brief daily instead of weekly — at most one email a day, on the days something moved
  • 25 Research Radar monitors — a whole line of work under watch, not your few live questions
  • 50 projects: one per review, chapter, or grant, each with its own comparison grid
  • Follow a field rather than a corner of one — 100 topics and 200 concepts
  • Save 2,000 papers and upload 150 private PDFs, readable by Ask PaperFren
  • Ask 3,000 grounded questions a month
  • Everything in Researcher
Sign up and start a 14-day trial

Card required at checkout. Cancel during the trial and you won't be charged.

Academic pricing

Researcher tools for $9/month or $84/year, including 5 monitors, 12 projects, and 300 sourced answers a month. Use an account with a recognized university email. If your university is missing, tell us its domain.

Create an account to check eligibility

PaperFren never sells access to papers; every study it explains is open access, and the original is linked from every page. Plans are independent of any other Fren subscription and can be cancelled from Settings. Student and Researcher include the same product tools with different question allowances; Student is the campus price for school emails. Pro adds research impact alerts — the movements that run through studies already in your projects, named claim by claim — a daily Brief instead of a weekly one, and room for a whole programme. If you are following questions rather than maintaining projects, Researcher is the right plan and we would rather you picked it.