Knowt vs Imprimo: Free Quizlet Swap or FSRS Built for Recall?
TL;DR: Knowt is a free, cross-platform Quizlet replacement with AI card generation, pre-made sets, and Quizlet import, used by millions of students. Imprimo is a paid iPhone and iPad app built around FSRS scheduling from day one, offline review, and a calm interface. The honest split: pick Knowt if free and cross-platform matter most, pick Imprimo if you want a modern scheduler you can see and trust for long-term recall. I built Imprimo, so read this knowing my bias. I have tried to be straight about where Knowt is the better choice.
I built Imprimo, so I am not neutral here. But "Knowt vs Imprimo" is a fair question, and Knowt is a genuinely good app that beats Imprimo on some things outright, starting with price. A comparison that pretends otherwise would waste your time. So here is the honest version, including the parts where I would point you to Knowt instead.
What each one is
Knowt is a free study app built as a Quizlet replacement. You can make flashcards by hand, generate them with AI from notes and PDFs, study pre-made sets other students have shared, and import your existing Quizlet sets directly. It runs on iOS, Android, and the web, and its own site calls it the number one free Quizlet alternative, with more than 5 million students and teachers using it. The core study loop is free, which is the whole pitch.
Imprimo is a native iPhone and iPad flashcard app built around three ideas: FSRS scheduling from the first card, AI card generation from your own material, and a calm interface that does not punish you for missing a day. It is paid only after a free trial, it is narrower than Knowt, and it does not try to be a free Quizlet.
This comparison covers how each app makes cards, schedules reviews, handles platforms and price, and who each one actually fits. It does not cover Knowt's classroom or teacher features in depth, since that is not what Imprimo competes on.
Knowt vs Imprimo at a glance
| Knowt | Imprimo | |
|---|---|---|
| Platforms | iOS, Android, web | iPhone and iPad |
| Price | Free core, paid tier for heavier AI | Free trial, then $12.49/mo or $74.99/yr |
| Scheduling | Adaptive study modes (session-based) | FSRS from day one, intervals shown |
| Card creation | AI from notes and PDFs, manual, pre-made sets | AI from PDFs, notes, URLs, YouTube videos, scans |
| Quizlet import | Yes, direct | No |
| Pre-made set library | Yes, large | No, your own material only |
| Offline | Limited, web-first | Yes, full offline review |
| Design | Feature-rich, Quizlet-like | Calm, single-purpose |
Where Knowt wins
I would rather say this plainly than bury it.
It is free, and not in a crippled way. Knowt's core flashcards and study modes cost nothing, including on the web. For a lot of students that is the entire decision, and it is a good one. Imprimo has a free trial and then charges. If you will not pay for a study app, Knowt is the honest answer and Imprimo is not.
It runs everywhere. iOS, Android, and a real web app. Imprimo is iPhone and iPad only. If you study on an Android phone, or on a school laptop in the browser, Knowt fits a workflow Imprimo cannot serve yet.
It imports your Quizlet sets. This is the migration pain most people never get past. Knowt pulls your existing sets in directly, so switching is close to free in effort. Imprimo has no Quizlet import; it expects you to generate cards from your own sources instead.
It has a pre-made set library. If part of why you use Quizlet is that someone already made the set, Knowt keeps that. Imprimo has no shared library at all. For a common course or a popular textbook, browsing an existing set can be faster than making your own.
Where Imprimo wins
FSRS by default, and visible. This is the core difference. Knowt's study modes adapt within a session, reshuffling cards you miss, much like Quizlet's Learn mode. That is useful, but it is not a forgetting-curve scheduler planning your reviews weeks out. Imprimo runs FSRS, the modern open-source algorithm, from the first card, and shows you the intervals. FSRS predicts recall with roughly 4% error versus the ~14% of the older SM-2 algorithm, and most students cut daily reviews by 20-30% at the same retention. For an exam months away, that gap compounds.
Built for your own material, with a review gate. Imprimo generates cards from your PDFs, notes, URLs, YouTube videos, and scanned pages, then puts every card behind a review gate so you can edit, regenerate, or delete it before it enters a deck. Knowt generates cards too, but the workflow leans toward pre-made sets and import. If your studying is your own lectures and readings, the generation-plus-approval loop keeps a 40-page PDF from becoming 200 weak cards.
Offline and on-device. Imprimo reviews work with no connection, and your cards live on your device. Knowt is web-first and cloud-based, so it leans on a connection and stores your material on its servers. If you study on a commute with patchy signal, or you would rather keep your notes local, that is a real difference.
A calm interface with one job. Knowt does a lot: notes, flashcards, study modes, a library, classroom tools. That breadth is the point for some people and clutter for others. Imprimo does one thing, card review scheduled with FSRS, and tries to stay out of your way. If you want fewer features done calmly rather than many features at once, that focus is the appeal.
The honest decision guide
- You will not pay for a study app: Knowt.
- You study on Android or in a browser: Knowt.
- You want your Quizlet sets moved over with no effort: Knowt.
- You rely on pre-made sets other people built: Knowt.
- You want FSRS scheduling you can see and trust: Imprimo.
- You study from your own PDFs and notes and want them made into cards: Imprimo.
- You want offline, on-device review on iPhone: Imprimo.
- You find big feature-rich apps distracting: Imprimo.
The thing this really comes down to
Strip away the feature grid and the choice is about two questions: will you pay, and do you want a real scheduler.
If the answer to "will you pay" is no, the comparison is basically over. Knowt is free, capable, and used by millions, and there is no shame in picking the tool that costs nothing and works. I would rather tell you that than talk you into a subscription you do not want.
But if you will pay for the right tool, the second question decides it. Knowt's adaptive study is built for getting through a set. Imprimo's FSRS is built for remembering material across a semester with less daily work. Those are different jobs. The honest reason to pay for Imprimo is that you want the scheduler, the offline review, and the calm, not that Imprimo is a cheaper or freer Knowt, because it is neither.
The bottom line
Knowt and Imprimo are aimed at different people. Knowt is the free, cross-platform Quizlet replacement, with AI cards, a set library, and direct Quizlet import, and it is a strong pick for most students who want flashcards without paying. Imprimo is the paid, focused alternative for people who want FSRS scheduling they can see, offline review on iPhone, and a calm interface built around their own material. If free and flexible is what you need, use Knowt. If you want a modern scheduler without the clutter, try Imprimo on the free trial and see whether the calmer, recall-first approach is what you were missing.
