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One module, free forever.
- 1 module
- 5 sources in it at a time
- 5 quizzes a week, of 5, 10 or 15 questions
- Flashcards for your module
- 30 Voice Lesson minutes, once
Know every concept in your course.
Add your slides, chapters and lectures. Get back concepts you can learn, quiz and revisit.
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New module
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Five ways to work on one concept.
All of them built from your own sources.
Live Voice Lesson
Explain it out loud.
A spoken lesson walks you through the concept, then asks you to explain it back and writes down what you covered.
Live Voice Lesson
Sodium-potassium pumpLive · 8:41 left
So the pump moves sodium out. Which way is potassium going, and is that with or against its gradient?
In, and against it.
Afterwards
Covered the ion ratio and the ATP cost. Did not reach inhibition by ouabain.
Quick Quiz
Quiz yourself on your own material.
Five, ten or fifteen questions in four types, written from whatever you added. Wrong answers are kept in Mistakes.
Quick Quiz · question 1 of 5
How many potassium ions enter the cell per ATP hydrolysed?
TwoCorrect answer
ThreeYou picked this
One
Three sodium out, two potassium in, per ATP.
- Lecture 4page 19Open
Flashcards
Review a deck you did not have to write.
Each concept comes with flashcards written from your sources. Adding a source updates them.
Sodium-potassium pump · card 2 of 3
Got itMissed it
Sources
Open the source behind any answer.
Every concept lists what it came from, with the page range, chapter or timestamp.
Sodium-potassium pump · sources · 3
- Lecture 4 — Membrane Transport.pdfpages 17–21Open
- Campbell BiologyCh. 7, pages 142–146Open
- Membrane Transport — full lecture21:06 – 27:40Play
Today
See what needs work before you decide.
Today lists a few concepts with the reason each one is there. You pick what to do.
Today · Cell Biology
Sodium-potassium pump
This one has caught you out a few times recently.
Facilitated diffusion
It has been 12 days since you last worked with this.
Membrane potential
New from Lecture 6. No history yet.
What students say
Pricing
Same product on both. Pro removes the limits.
Pro
$149 / year
$12.42/month, billed annually · Save $79
- Unlimited modules
- Unlimited sources
- Unlimited quizzes
- Flashcards across all your modules
- 300 Voice Lesson minutes a month
FAQ
What happens to the PDFs I upload?
They go into private storage only your account can reach, and stay openable as Sources. We extract the text to find concepts, we do not train any model on your material, and deleting a Source removes the file and its text.
Can I use lecture slides, textbooks and YouTube?
Yes. A Source is a PDF, a website or a YouTube video. A textbook chapter and a two-hour recorded lecture both work, and both keep their page numbers or timestamps.
How does one concept end up with several sources?
SymbioLearn reads each Source, finds what it teaches, and checks that against the concepts already in the module. Where your slides, a textbook and a video explain the same thing, that is one concept with three sources recorded underneath it, even when they use different names for it.
How is this different from asking a chatbot?
A chatbot answers from whatever it absorbed. SymbioLearn searches your own module first, then writes the question, the correction or the explanation from those passages and shows you which ones. If your material does not support a good question, it does not invent one.
How are Live Voice Lesson minutes counted?
By connected conversation time, measured on our servers and rounded up to the nearest minute. Reading the Lesson record afterwards costs nothing.
What happens when the minutes run out?
Lessons stop starting. Nothing is charged for going over, ever. Sources, concepts, quizzes and flashcards carry on working.
What is included in Free?
One module, 5 sources in it at a time, 5 quizzes a week, flashcards, and 30 Live Voice Lesson minutes in total. Those 30 minutes are a one-off allowance, not a monthly one. No card.
What happens to top-up minutes I have bought?
Top-ups are 60 minutes for $5 or 180 for $12. They do not expire and they survive the monthly reset. Included minutes are spent first.
Can I cancel Pro?
From your account, whenever you want. Pro runs to the end of the period you paid for, then the Free limits apply again. Your modules, sources and history stay where they are.
The free spaced repetition planner turns an exam date and a list of topics into a day-by-day revision schedule. No account needed.