Note Harbor
New: SM-2 spaced repetition & cited AI answers

AI flashcards, cited chat and a real study workspace

Note Harbor turns your PDFs, web pages and notes into cited flashcards, practice tests and mindmaps — with SM-2 spaced repetition to help it actually stick. Free forever plan, no credit card required.

noteharbor.app / notebook / cellular-biology
U
Summarize chapter 3 in 5 bullet points with citations.
H
  • • Cells are the fundamental unit of life [p.42]
  • • Prokaryotes lack a nucleus [p.44]
  • • The plasma membrane is selectively permeable [p.47]
  • • ATP powers most cellular reactions [p.51]
  • • Mitosis produces two identical daughter cells [p.55]
StandardThinkingPro
Built for

Anyone with more to read than time to study

Students
Turn lecture PDFs and slides into cited flashcards
Researchers
Chat with your paper library and keep notes citable
Professionals
Retain what you read from reports, docs and articles
Lifelong learners
Learn faster with active recall and spaced repetition
How it works

From source to mastery in three simple steps

Content Studio

One workspace, multiple output formats

Note Harbor Studio turns your sources into notes, mindmaps, tutor sessions, practice tests, podcasts, and more. Pick the format that fits your workflow.

Notes
Block-based editor with AI-powered writing
Practice Tests
Generate MCQs and short-answer exams from your sources
Mindmap
Map key concepts and relationships at a glance
Tutor
Talk through ideas with your AI professor
Flashcards
Create and review cards in one focused flow
Track
Follow a guided learning path from your sources
Flashcard Mode

Master every card with multiple review styles

Move between column, toggle, list, typing, and learn workflows without leaving your notebook. Study the way that helps you retain more.

Column View
Mode 1
Scan and organize your flashcards in a focused column layout
Q
What is spaced repetition?
A
A learning technique with gradually increasing review intervals.
Toggle + List View
Mode 2
Switch between toggle and list views for rapid card review
Q
What is spaced repetition?
A
A learning technique with gradually increasing review intervals.
Typing View
Mode 3
Use typing mode to strengthen active recall
Q
What is spaced repetition?
A
A learning technique with gradually increasing review intervals.
Learn Mode
Mode 4
Review cards with guided pacing and progress feedback
Q
What is spaced repetition?
A
A learning technique with gradually increasing review intervals.
Why Note Harbor

A study workspace, not a chatbot in a box

Six principles we designed the product around — every one of them is a feature you can use today.

1
Grounded in your sources

Every AI answer cites the exact document it came from. No made-up facts.

2
Built for retention, not just Q&A

SM-2 spaced repetition, weak-topic analytics, and 5 flashcard modes to make it stick.

3
One workspace, five outputs

Chat, flashcards, mindmaps, practice tests, and study guides — from the same sources.

4
Own your data

Export any deck to CSV, Markdown, PDF or Anki. No lock-in, ever.

5
Free forever plan

3 sources per notebook and 50 cards a month, with every core feature unlocked.

6
Transparent, honest comparisons

We publish head-to-head pages with the competitors — even when they win.

Your knowledge, organized.

Bring your first source. See a cited answer in under 60 seconds.

Cited answers you can verify No credit card required

No credit card required · Free forever plan