How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Anki remains the reference: free on desktop and Android, endlessly customisable, and powered by the FSRS scheduler that modern research favours.
- Quizlet is the easy on ramp, with millions of ready made sets, though its study modes now sit behind Quizlet Plus prompts.
- RemNote and Mochi build flashcards into your notes, so learning material becomes review material without a second app.
- Memrise specialises in languages with native speaker video; SuperMemo is the original algorithm's home for purists.
- Spaced repetition works if you review daily; the best app is the one whose reviews you will actually finish.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Anki | Serious learners who want control | Free | Yes |
 Quizlet | Ready made sets and quick starts | See website | Yes |
 RemNote | Flashcards born inside your notes | See website | Yes |
 Mochi | Beautiful, simple personal flashcards | See website | No |
 Memrise | Language learning with video | See website | Yes |
 Brainscape | Confidence based repetition for exams | See website | Yes |
 SuperMemo | The original algorithm, maximum depth | See website | Yes |
 Knowt | Free Quizlet style study with AI help | Free | Yes |
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The best spaced repetition apps
Starting priceFree
Free planYes
Anki is less an app than an institution. Medical students pass board exams on it, language learners build ten thousand word vocabularies in it, and its scheduler research (FSRS, developed with its community's data) now leads the field the SuperMemo algorithm founded. If the material matters and the timeline is long, this is the default.
Its costs are effort and one odd price. Desktop and Android are free; the official iOS app is a one time 24.99 dollars, which funds the project. Beginners should budget an evening to learn card design principles (one fact per card, cloze for context) because Anki amplifies good cards and bad ones with equal efficiency.
Choose Anki when the learning is a project of months or years. For a quiz on Friday, the next entry is faster.
What we like- Free and open source on desktop and Android, with a sync service (AnkiWeb) included, the FSRS scheduler adapts intervals to your actual memory performance, and reviews feel noticeably better timed than the classic algorithm, a giant ecosystem of shared decks for medicine, languages, law and exams, total control: card types, cloze deletions, image occlusion, statistics that show your memory honestly
Watch out for- The official iPhone app costs 24.99 dollars one time, the project's funding quirk, the interface is powerful and dated in equal measure
- Setup has real learning curve, shared deck quality varies wildly, and a bad deck teaches bad facts confidently, you make or choose the cards
- There is no content team smoothing the path
#2Quizlet
Best for: Ready made sets and quick starts4.5/5 on
G2 (291 reviews, checked Oct 2026)
Visit quizlet.com
Starting priceSee website
Free planYes
Quizlet is where most people meet flashcards, and for school shaped studying it is hard to beat: someone has already made the set for your course, and the app drills it pleasantly. Its Learn mode adapts within a session, which feels like spaced repetition even where the long term scheduling is lighter than the specialists'.
The distinction matters for long projects. Quizlet optimises for passing Friday's test; Anki optimises for remembering in two years. Students should use Quizlet for the semester and export anything precious into a system built for permanence.
Check your sets before trusting them. A wrong fact learned confidently is worse than no fact, and Quizlet's scale guarantees some wrong facts are popular.
What we like- Millions of user made study sets mean your textbook's flashcards probably already exist, the fastest start in the category: search, study, done, learn and test modes vary the practice beyond flipping cards, teachers and classes are built into its world, which suits school and university use
Watch out for- Spaced repetition in the strict scheduler sense is thinner than Anki's
- Quizlet is a study modes platform wearing SRS colours, the best modes and AI features sit behind Quizlet Plus, with pricing by plan and promotion, hence See website, set quality is user generated and unvetted
- Errors in popular sets are a documented hazard, ads interrupt the free tier's flow
#3RemNote
Best for: Flashcards born inside your notes3.5/5 on
G2 (1 reviews, checked Oct 2026)
Visit remnote.com
Starting priceSee website
Free planYes
RemNote answers the workflow complaint every student knows: notes in one app, flashcards in another, and the copying between them is where study time dies. In RemNote the note is the deck. Highlight the definition while reading, and it enters your review queue wearing its context.
That integration is why it wins converts among medical and graduate students whose source material is dense documents rather than tidy facts. Its scheduler uses the modern FSRS approach, so the reviews themselves are as smart as Anki's.
The price of the integration is commitment to its notes system, priced in tiers we mark See website because its packaging moves. Take the free tier through one full course before deciding; a semester is the honest trial.
What we like- Notes and flashcards are the same object: write your lecture notes, mark the facts, and they become scheduled cards automatically, an FSRS based scheduler handles the review timing with modern accuracy, PDF annotation turns readings into cards without retyping, a real free tier covers study scale use, with Pro adding the heavier features
Watch out for- The note taking system asks you to adopt its way of organising knowledge, not just an app, learners with existing note systems elsewhere face a migration decision, pricing tiers and AI features shift with the product's rapid development, check the current plan page, less suited to pure deck consumption than Anki or Quizlet
Starting priceSee website
Free planNo
Mochi is the aesthete's Anki: the same personal deck discipline, wrapped in an interface that feels like a well made notebook. Writers, programmers and language learners who live in Markdown take to it immediately, and its card linking suits knowledge that forms a web rather than a list.
Its honesty is its pricing: no free tier to grow out of, just a subscription for a tool that does one job well. In a category of funnels and upsells, that directness is itself a feature, though it means the curious cannot drift in free.
Choose Mochi when you make your own cards and value calm software over a game layer.
What we like- A calm, well designed flashcard app that syncs across desktop and mobile, with Markdown support for people who think in text, spaced repetition scheduling without gamification or social noise, cards link to each other, so knowledge connects rather than stacks, offline first design respects travel and focus
Watch out for- No free plan beyond a trial, so the relationship starts with payment (pricing is subscription, checked on its site), you make every card yourself
- There is no set library to borrow, a small team's product, with development pace to match, less exam specific tooling than Brainscape or Anki's ecosystem
Starting priceSee website
Free planYes
Memrise understands that vocabulary is not only recalled but recognised in the wild. Its signature is the native speaker clip: the word you are learning, said by a real person in a real place, which builds listening recognition that text only flashcards cannot.
For language learners it beats Duolingo on vocabulary depth and review discipline, while losing on game design. Serious learners often run both: Duolingo for habit, Memrise for words.
Stay inside languages and Memrise is excellent. Its free tier covers a real start; the subscription decision comes when a course becomes a commitment.
What we like- Built for languages: courses pair spaced repetition with short videos of native speakers using the words in real streets and cafes, official courses cover the major languages with a sensible beginner path, the community course library adds breadth, including minority and constructed languages, its review scheduling is tuned for vocabulary, the job it is hired for
Watch out for- A language specialist: it will not schedule your pharmacology deck, a subscription opens the full course path, and pricing varies by plan and region, hence See website, the app's direction has shifted over the years between community courses and its own AI features, which long time users debate, depth beyond intermediate vocabulary needs other tools beside it
Starting priceSee website
Free planYes
Brainscape's idea is that you know what you half know. Rating each card's confidence from 1 to 5 lets its scheduler hammer the shaky facts and spare the solid ones, a human input pure timing algorithms lack. For exam candidates with a fixed syllabus, that efficiency is the product.
Its certified decks are the other draw: professionally built sets for the big exams, sold as a safer bet than anonymous user uploads. Students who have been burned by a wrong Quizlet fact understand the pitch instantly.
Choose Brainscape when the exam has a name and a date. Its focus is narrower than Anki's universe and, for that job, better aimed.
What we like- Its method adds a twist: you rate your confidence in each answer, and the scheduler weights repetition by confidence as well as time, certified class decks for major exams (medicine, law, languages, professional licences) are created with subject experts, a clean, focused interface with none of the social layer's distractions, works well for professional certification study where the syllabus is fixed
Watch out for- The deepest content and features sit behind its Pro subscription, priced by plan, free tier limits bite on large decks, confidence rating depends on honest self assessment, which struggling students are worst at, smaller deck ecosystem than Quizlet's open library
Starting priceSee website
Free planYes
SuperMemo is the ancestor: the program whose SM algorithms taught the world spaced repetition, including Anki's original scheduler. Its creator's decades of memory research still feed the field, and FSRS exists partly as the open community's answer to it.
Its full system, incremental reading and all, is the most powerful learning environment here and the least forgiving. Learners who master it process entire libraries into lifelong knowledge. Learners who bounce off its interface join the Anki majority, which is a respectable fate.
Try SuperMemo if the science fascinates you. Everyone else can honour it via the tools it inspired.
What we like- The origin of spaced repetition software: SuperMemo's algorithms have been refined since the 1980s by its creator's research, incremental reading lets you process articles and books into cards inside the same system, a depth of scheduling control no rival attempts, for learners who treat memory as a science, the modern app offers courses and a more approachable face than the legendary desktop original
Watch out for- The classic software's complexity is famous
- The learning curve is the steepest in this list by a distance, its ecosystem and shared content are smaller than Anki's, which inherited its research community, pricing spans app subscriptions and course sales in a structure that needs its site to explain, platform availability has historically centred on Windows and its own apps
Starting priceFree
Free planYes
Knowt is the insurgent: it watched Quizlet move features behind Plus and built the free version of that product, with AI card generation from your own notes as its modern twist. For students, especially, the pitch lands: the study tools you need, without the subscription lecture.
Its flashcard and test modes cover the school use case completely, and importing existing Quizlet sets takes minutes, which defuses the switching cost. Its spaced review exists but is not the research grade scheduling of Anki or RemNote; treat it as study modes with memory benefits.
Choose Knowt for coursework now and free. If the material must live for years (a language, a medical career), graduate the precious decks to Anki and keep Knowt for the semester's battles.
What we like- A free study platform in Quizlet's shape (flashcards, practice modes, class sets) that keeps core features free rather than paywalling them, AI tools turn notes and lectures into flashcards and practice questions, a natural home for students priced out of Quizlet Plus, imports from Quizlet make switching cheap for existing sets
Watch out for- A younger company, so its library and longevity trail the incumbent's, spaced scheduling depth is lighter than the specialists, the product is evolving quickly, which means features and terms move, teacher and school features are still growing
How we chose
We shortlisted spaced repetition and flashcard platforms a US learner can adopt in October 2026, weighting scheduler quality, card creation workflow and free tier honesty. Several platforms price by promotion and plan length, so those entries are See website rather than a number with a short life; free tiers are described from the platforms' own pages. We did not run learning experiments for this article; scheduler claims (including FSRS's advantages) reflect the published research discussion in this field.
How to choose a spaced repetition app
Match the app to the material's lifespan. This semester's course: Quizlet or Knowt, where ready made sets and quick modes win. A career's knowledge (medicine, law, a language): Anki or RemNote, where the scheduler and your own cards compound for years. A named exam: Brainscape's certified decks deserve a look. A language with listening: Memrise joins whichever base you choose.
Second, decide who makes the cards. Making your own is slower and far more effective for deep learning; borrowing is faster and risks other people's errors. The hybrid most serious learners use: borrow the skeleton deck, then rewrite and extend it in your own words as you study.
Third, judge the review experience, not the creation features. You will open this app daily for years, and the review flow (speed, offline behaviour, one handed phone use) decides whether the habit survives February. All the finalists here are free to start; run each for one honest week.
Finally, protect the collection. Export your decks regularly in an open format where the app allows it, and keep the master copy somewhere you control. A decade of flashcards is an asset; it should not be hostage to any company's pricing meeting.
Frequently asked questions
Is Anki really free?
On Windows, Mac, Linux and Android, yes: free and open source, with free sync through AnkiWeb. The official iPhone and iPad app costs 24.99 dollars one time, which is how the project funds itself. Beware similarly named apps in the stores that are not the official one.
What is FSRS and does it matter?
FSRS is a modern scheduling algorithm, developed with data from Anki's community, that models how memory decays for each card and learner. It generally reaches the same retention with fewer reviews than the older SM-2 algorithm. Anki and RemNote offer it; if you study at volume, the saved reviews add up to hours.
Quizlet or Anki for a student?
Quizlet for a course with an exam this term, especially where a ready made set exists. Anki for knowledge that must survive the course: professional exams, languages, cumulative subjects. Many students use Quizlet during term and move the keepers into Anki at the end.
How many reviews should I do a day?
As many as the queue gives you; its size is set by how many new cards you add. A sustainable pattern is 10 to 30 new cards a day. Consistency beats volume: twenty minutes daily outperforms three hours on Sunday.
Can spaced repetition work for things besides flashcards?
Yes. The principle schedules any recall practice: practice questions, problem sets, even skills rehearsed at expanding intervals. Apps like RemNote and SuperMemo build reading and notes into the system for exactly this reason. The flashcard is the simplest form, not the only one.
Sources we checked (0)
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.