Fen

Research-backed AI companion for PMOS (formerly PCOS)

The daily companion PMOS care was never built to be

Speak or write naturally. Fen turns your check-ins into a structured diary, and answers your questions from vetted research, with citations you can actually trust.

Try Fen for freeSee it in action

No password, no card. Sign in with just your email.

Free guide: Know your PMOS subtype →

Built for women navigating PMOS longitudinally, not another rigid tracker or generic chatbot.

PMOS isn't a one-time problem

It's longitudinal, emotionally loaded, and deeply individual. The system wasn't designed for that, so women piece together support alone.

  • Fragmented care

    Short clinic visits, sporadic dietitian advice, and endless online threads. None of it knows your actual day.

  • Conflicting advice

    Generic protocols and influencer stacks that sound confident but don't fit your body or your life.

  • Guilt loops

    When results don't come, the default story is self-blame, not "this advice wasn't built for me."

See the loop in action

Check in once. Watch Fen capture meals, mood, and movement, then explore a cited answer that respects how real adherence works.

Interactive preview, not your data

Good afternoon

How is today going?

What did your day feel like?

Illustrative only. Tap Try sample check-in or Try voice, then open Learn and tap [1] / [2] for source cards.

One calm rhythm, three parts

  1. Step 1

    Check in naturally

    Voice or text, whenever it fits. No rigid forms or streak pressure.

  2. Step 2

    Your day, organized

    Check-in and diary live on Today: meals, mood, symptoms, and more, structured and editable in one place.

  3. Step 3

    Learn with citations

    Ask questions grounded in human-approved research. See exactly where answers come from.

Governed AI, not guesswork

Trust is the biggest barrier in PMOS care. Fen's research layer is deliberately constrained: only human-approved excerpts can appear in answers. When evidence isn't there, we say so.

  • Papers uploaded → chunked → manually reviewed
  • Retrieval limited to approved chunks only: pgvector search over an approved-only index in Postgres
  • Every claim carries visible [n] citations

Research pipeline

Upload PDF
    ↓
Parse & chunk
    ↓
Human review ──→ reject
    ↓ approve
Embed & index
    ↓
User chat (cited answers only)

“Women with PMOS don't just need advice. They need a system that listens continuously, organizes reality for them, and helps them make sense of it, without judgment.”

Core product insight

Where we are today

What Fen does today

  • ✓Voice & text check-ins with AI extraction
  • ✓Structured daily diary (8 categories), editable
  • ✓Research-backed chat with numbered citations
  • ✓Personal toolkit: saved answers & practices
  • ✓Gentle support after overwhelming check-ins
  • ✓Admin pipeline: upload → review → approve chunks

Next on the roadmap

  • ○Pattern insights over time
  • ○Preferences & personalization
  • ○Conversation history in Learn
  • ○Clinician visit prep summaries

Begin with one small check-in

Speak or type about your day, and watch Fen organize it. Your diary, cited answers, and saved toolkit, free.

Try Fen for free

No password, no card. Just your email.