You've just imported your old Quizlet sets into Knowt, run a Learn round with no paywall in sight, and you're waiting for the catch. Most students who search this are in that exact spot, usually a week or two before a test.
Yes, Knowt is free, and the free plan is real. You can make unlimited flashcard sets, import from Quizlet and use the main study modes (Learn, practice tests, matching and spaced repetition) without paying. The limits sit on the AI. Turning PDFs, notes and videos into cards and summaries is capped each month on free, and unlimited chat with Kai, Knowt's AI tutor, is on the paid Ultra plan. So if you write or import your own cards, you may never pay. If you lean on the AI to build your sets, you'll feel the cap.
I build The Study Mill, which competes with Knowt, so weigh my view accordingly. I've tried to be plain about where Knowt is the better pick.
What the free plan covers
At the time of writing, third-party reviews agree on the broad shape of Knowt's free plan, even if they disagree on details:
| Knowt free | Knowt Ultra | |
|---|---|---|
| Flashcard sets | Unlimited | Unlimited |
| Learn, practice tests, matching, spaced repetition | Yes | Yes |
| Import from Quizlet | Yes | Yes |
| AI cards and summaries from your files | Capped each month | Unlimited |
| Kai, the AI tutor | Capped | Unlimited |
| Ads | Yes | None |
| Price | Free | Around US$149.99 a year (about US$12.49 a month) |
Knowt doesn't publish its exact free AI limits in a way I could pin down, and reviews quote different numbers, so I won't guess. Check the counter inside the app before you plan a semester around it.
Where you'll hit the wall
The free plan holds up best for students who study from terms and definitions. Pharmacology drug classes, the bones of the hand, the elements of negligence, the stages of Piaget's theory. You can type those cards yourself, or import a set someone already made, and Knowt's study modes will drill them for as long as you like. I wrote about why testing yourself beats rereading, and Knowt's free modes do that part well.
The cap starts to matter when your workflow is "upload the week's slides and let the AI make the deck". Do that for four units across a twelve-week semester and you're asking for a lot of generation. Reviews describe heavy users of the PDF and video tools running into the monthly limit fairly quickly. That's usually the moment people search this question.
The other wall is Kai. A tutor that has read your notes is useful when you're stuck on something like why a beta blocker masks hypoglycaemia. On free, you get a taste of it. If you find yourself asking it a lot of questions, that's what Ultra is selling.
What Ultra costs, and whether it's worth it
Most recent reviews put Ultra at around US$149.99 a year, which works out to about US$12.49 a month. Paying month to month is reported at roughly double that. Some reviews list cheaper or older prices, and a few mention a lower tier, but they don't agree, so I'd treat anything other than the annual Ultra figure as unconfirmed until you see Knowt's own page.
My honest take:
- Don't pay if you mostly make or import your own cards. Free Knowt is one of the best free flashcard setups around, and paying won't make the cards stick any better.
- Consider Ultra if you generate most of your sets from slides every week and you're hitting the cap mid-semester. Pay yearly if you pay at all. Monthly only makes sense for a single exam block.
- Look elsewhere if the thing you need isn't more cards. Ultra gives you more AI, but it's still a flashcard app at heart.
That last point is the one students miss. If your exams are mostly "explain why" and "apply this to the patient in the case study", a bigger deck won't close the gap. I went through that in Knowt alternatives, and in Knowt vs StudyFetch I compared how far each free plan carries you.
Where Knowt beats The Study Mill
It's worth saying clearly. Knowt has a big shared library, so if your unit uses a common textbook, there's probably a set already made. It imports your Quizlet history. And its free plan has no limit on how many sets or subjects you can study. The Study Mill does none of that. It only studies what you upload, and the free plan is 2 classes.
Where The Study Mill fits
The Study Mill is built for a different job: turning one week of your own lecture into a whole study session, not a deck. You upload slides, a PDF, Word notes, a photo of handwritten notes or a lecture recording, and each week becomes:
- Short lessons that explain each idea with an analogy
- Flashcards, some illustrated and linked back to their lesson
- A quiz mixing multiple choice with written answers marked by AI
- Notes and a tutor you can ask about that week
- Walk & Learn, where Milli and Luke teach the week as audio and ask you questions you answer out loud
Daily review brings back what you got wrong, and if you set an exam date it plans revision around your timetable.
The free plan is 2 classes, with every week in them. It doesn't include everything. Pro is A$7.99 a month or A$49 a year, and adds unlimited classes, exam mode and cram sheets. Students with a .edu or .edu.au email get 50% off, so A$3.99 a month.
So, should you pay for Knowt?
Start free and stay free until a limit actually stops you. Knowt's free plan is generous enough that plenty of students never upgrade, and that's to its credit. If the AI cap is the only thing in your way and flashcards suit your exams, Ultra on the annual plan is a fair deal. If you're paying because cards alone aren't getting your marks up, spend that money (or nothing) on something that makes you explain the material instead.
If you want to see the difference, try one lecture. Upload a week to The Study Mill, do the quiz with the written answers, and compare it to the same week in Knowt. It takes about a minute and no card.
Other apps' prices and features are as published in October 2026 and change often. Check their own pricing pages.