First week
$0
All of Pro, on your own lectures.
- Everything in Pro for 7 days
- 30 Voice Lesson minutes
A tutor for your own lectures.
Upload a lecture and get a 15-minute spoken Lesson on it, taught from your own pages.
Sodium-potassium pump · Cell Biology
12:24 left
End Lesson
2 of 4 · Why the pump costs energy
Your turn
Hold to talkSwitch to open micSay it againVisualise it
VisualsLessonSources3
Anything the tutor draws appears here, and stays with the Lesson afterwards.
Everything you can do in a module.
All from your study material.
Live Voice Lesson
Have an AI tutor teach you.
The tutor talks you through a concept from your own study material. Interrupt any time, or ask it to explain something a different way.
More about Voice LessonsFirst-pass metabolism · Pharmacology
12:07 left
End
3 of 5 · Why the oral dose is larger
Listening
A tablet has to go through the gut wall and then straight through the liver before any of it reaches the rest of you. The liver takes a cut on the way past, and what is left is the bioavailable fraction.
YouSo an injection skips all of that?
It does. Straight into the blood, nothing taken off, which is why the oral dose of the same drug is the larger of the two.
Visuals
Ask the tutor for a diagram.
When a curve or a diagram explains a concept faster than words, the tutor draws it beside the conversation. Some drawings you can move and change, and they stay with the Lesson for when you come back.
More about Voice LessonsStandard deviation · Research Methods
8:41 left
End
Two classes can sit the same paper, average the same mark, and feel nothing alike. Widen the spread and watch what stays inside the band.
Same average, different spread
Drag the spread. About 68% of the class is always inside one deviation.
spread 12
Past papers
Learn to answer past paper questions.
Upload a past paper and work through each question one line at a time. Every line comes with the reason for it, so you learn how that kind of question is answered.
More about Past papersQuestion 3 (b) · 5 marks
Circle geometry
Paper
TA is a tangent at A. Angle TAB = 62°, angle ABC = 48°. Determine, with reasons, the size of angle BAC.
angle ACB = angle TAB = 62°
Tan-chord: the angle between a tangent and a chord equals the angle in the alternate segment.
angle BAC + 48° + 62° = 180°
Angles in triangle ABC add up to 180°.
Next: solve for the angle asked for
Write your line first, then see how it is set out and why.
Quick Quiz
Quiz yourself on your own notes.
Pick a quiz type (multiple choice, fill in the blank, true or false, or mixed) and answer 5, 10 or 15 questions from your own study material.
More about Quick QuizQuestion 4 of 10
Quick Quiz
Leave
A firm in perfect competition is producing where marginal cost is above marginal revenue. What should it do?
aRaise its priceYou
It cannot. A price taker sells at the market price or sells nothing.
bReduce output
Each extra unit is costing more than it earns, so the last ones are losing money.
cLeave the market
Profit is at its highest where marginal cost equals marginal revenue. Above it, cutting output raises profit.
- Lecture 6 Perfect Competition.pdf · page 22Open
Mistakes
Revisit every question you got wrong.
Every question you miss in a quiz is saved, with your answer beside the right one. Revisit Mistakes quizzes you on just those, and each one leaves the list when you get it right there.
More about MistakesMistakes · Organic Chemistry
4 kept
SN1 and SN2 mechanisms
Revisit MistakesWhich substrate favours SN1missed 3 times
You said: Primary alkyl halide
The material says: Tertiary. The carbocation is stabilised by three alkyl groups.
Effect of a polar aprotic solvent
You said: Slows the reaction down
The material says: It speeds SN2 up by leaving the nucleophile unsolvated.
Flashcards
Turn your notes into flashcards.
Go through a deck in the ten minutes before a class. Cards you miss come back sooner, and cards you know come back less often.
More about FlashcardsBrachial plexus · Anatomy
Card 2 of 14
Leave
Got itMissed it
Sources
See where every answer came from.
Every concept, question and card links to where it came from, like page 148 or 14:20 in a lecture video. Tap Open to go straight to that page or that point in the video.
More about SourcesChapter 12 Elasticity of Demand.pdf
Page 148 of 320
Leave
12.3 Price elasticity of demand
Sections
- Determinants of demandpage 141
- Price elasticitypage 148
- Cross elasticitypage 155
- Income elasticitypage 161
Today
Know which concepts to review today.
Today picks a few concepts and says why each one is there: a review is due, you got it wrong twice recently, or your exam is close. It's spaced repetition without a timetable to keep.
More about TodayToday · Biochemistry
3 worth a look
Krebs cycle regulation
LearningThis one has caught you out a few times recently.
Enzyme inhibition
Review dueIt's been 12 days since you last worked with this.
Glycolysis: the rate-limiting steps
NewNew. Nothing worked through on it yet.
Today says what deserves attention. You choose Lesson, Quiz, Flashcards or Sources.
Hey, I’m Thabani 👋
I’m the founder of SymbioLearn.
It started as my final-year university project in 2023. The first version was basically: upload a PDF and talk to it.
A lot has changed since then, but the problem I’ve kept coming back to is the same one: getting an answer is easy. Being able to explain the idea, remember it later and use it when the question changes is harder.
That’s what SymbioLearn is built around now.
What people say about it
Pricing
Everything is free for your first 7 days.
Pro
$19 / month
Billed monthly · Cancel anytime
- 300 Voice Lesson minutes every month, about 20 Lessons
- Unlimited modules and sources
- Unlimited quizzes, flashcards and past papers
- Top-ups that never expire, if you run out
Free study tools
No account needed. They run in your browser.
- Spaced repetition plannerA day-by-day revision schedule for your exam
- Procrastination calculatorThe latest date to start an assignment and still finish on time
- Study ROI calculatorWhich course has the most marks left to gain
- Forgetting curve calculatorHow quickly you forget a topic, and when to review it
FAQ
What can I put into it?
Your study material, whether that is a PDF, a Word or PowerPoint file, Markdown notes, a website or a YouTube video. Past papers go in too, to practise on. A file can be up to 50 MB and 1000 pages or slides, and a video up to 4 hours. Each one keeps its page numbers, slides, headings or timestamps, so anything SymbioLearn tells you can be traced back to where it came from.
How is this different from asking ChatGPT?
It works from what you put in. Every question, correction and explanation is written from a passage in your own material and shows you which passage, so you can open it and check rather than take its word for it.
What do I get for free?
Your first 7 days include everything in Pro, with 30 Live Voice Lesson minutes, which is two full Lessons. After the week your modules and sources stay in your account, and studying with them needs Pro.
How are Live Voice Lesson minutes counted?
Minutes count while the conversation is connected, and are rounded up to the nearest minute. When they run out, Lessons stop starting; concepts, quizzes, flashcards and Today carry on. Top-ups are 60 minutes for $5 or 180 for $12, they do not expire, and included minutes are spent first.
Can I cancel Pro?
Yes, from your account, whenever you want. Pro runs to the end of the period you paid for. After that your modules, sources and history stay where they are, and studying with them needs Pro again.
What happens to the files I upload?
They go into private storage only your account can reach, and stay there to open as Sources or download as the file you uploaded. SymbioLearn extracts the text to find the concepts in it. Your material is not used to train models, and it is not used to answer anyone else's question. Deleting a Source removes the file and its text; deleting a module removes everything in it.
Start with the lecture you’re most behind on.
Your first Lesson on it is ready in about a minute.