Tell it how long you've got.
Get a session that fits.
Give Fern a topic or your notes, and the time you actually have. It builds a session of six interactive task types, sized to that clock.
From “what do I even study?” to a plan you can start.
Tell it what to study
Type a topic in your own words, or drop in a PDF or DOCX. Fern reads the whole document and builds a digest of what actually matters.
Set your study time
Fifteen minutes on the bus, or ninety before an exam. The number of tasks and the length of each are derived from that clock, not from how much you uploaded.
Work straight down it
Read the summary, drill the cards, sit the check, solve the problems. Progress, highlights and notes are saved as you go, so you can stop and come back.
Six ways to study one topic.
These six are the whole vocabulary — nothing else gets invented. A router decides which your session needs and how many minutes each one gets.
Summary
The topic in structured points, not a wall of text. Highlight it and leave yourself margin notes.
Flashcards
Front-and-back pairs you flip, shuffle and swipe. The ones you keep missing feed the review deck.
Knowledge Check
Multiple choice with an explanation behind every answer. Retry only the ones you missed, or redo the lot.
Problem Solving
Type a real answer and have it scored with partial credit and specific feedback. Solutions stay hidden until you commit.
Mnemonic Drill
Acrostics, acronyms, rhymes and associations built around your actual subject, not generic filler.
Categorization
Tap concepts into the group they belong to. Fast to do, and unforgiving about what you half-know.
Six ways to work, chosen for your topic.
A router picks which your session needs and how long each gets. Each one is playable right here — try them.
Markdown overviews you can highlight and annotate.
Cellular Respiration Overview
Cellular respiration is the process by which cells break down glucose to produce adenosine triphosphate (ATP), the cell's primary energy currency.
The process occurs in three main stages:
- Glycolysis — occurs in the cytoplasm
- Krebs Cycle — occurs in the mitochondrial matrix
- Electron Transport Chain — occurs in the inner mitochondrial membrane
Select any line to highlight it, or pin a note in the margin.
Front/back recall, shuffled, with a spaced-repetition deck.
Click to flip
Multiple choice with explanations and retry-missed.
Which organelle is responsible for energy production in a cell?
Type a real answer; the AI scores it with partial credit.
A reaction has ΔH = −92 kJ and ΔS = −198 J/K at 298 K. Is it spontaneous?
Acronyms, acrostics and rhymes built for the topic.
Electron transfer in redox reactions
OIL RIG
- O
- I
- L
- R
- I
- G
Tap to sort concepts into the right groups.
Drag a term, or tap it then tap a group
The ones we get asked.
Fern turns a topic you type, or a PDF or DOCX you upload, into a study session made of interactive tasks. You say how long you have; the session is sized to that, not to how much material you gave it.
You give it a topic or a file, and the minutes you have. A router picks which task types the session needs and how long each one gets, then generates the content for each task as you reach it. Be specific — "Krebs Cycle for my Chemistry exam" beats "biology". You can reorder, remove, or add tasks before you start.
Summary, Flashcards, Knowledge Check, Mnemonic Drill, Problem Solving, and Categorization. Every session is built from these six. A 15-minute session uses three of them; a 90-minute session uses all six.
A multiple-choice run over the session's material. Each question carries an explanation of why the answer is right, and when you finish you can retry only the ones you missed or redo the whole set.
Yes. On upload, Fern first builds a structured digest of the whole document, and every task is generated against that digest rather than a truncated excerpt — so the tasks stay tied to what your document actually says.
Nothing. Fern is free to use and there is no paid plan today. Each account has a monthly limit on sessions and per-session limits on regenerating tasks, which keep generation costs in check.
Your next study session fits.
No card, no setup. Give it a topic and the minutes you have, and start from the top.