The Best Spaced Repetition Apps in 2026: An Honest Comparison

Every spaced-repetition app claims the same science, because they all use roughly the same idea: show the card again just before you forget it. What actually separates them is everything around the algorithm, and that is where most people pick wrong.

Ask which spaced-repetition app is best and you will get an argument about algorithms, which is the least useful part of the answer. The scheduling engines converged years ago; most serious apps now run something in the SM-2 family or the newer FSRS, and the difference between them is real but modest compared to the difference between a deck you maintain and a deck you abandon.

So this comparison is organised around the things that actually decide whether you are still using the app in three months: how much friction there is in getting material in, how it feels on a phone at the end of a tired day, and what it costs.

What to judge an SRS on

Four things, in roughly this order of importance.

• Capture friction: how long it takes to turn something you just met into a card. This is the hidden killer, because a deck stops growing before it stops being reviewed.
• Daily feel: whether a ten-minute session on a phone is pleasant or a chore.
• Scheduling quality: whether the algorithm adapts to you or just applies fixed multipliers.
• Cost and lock-in: subscription versus one-off, and whether you can export your cards if you leave.

Anki: still the benchmark

Anki remains the reference point, and deservedly. Its scheduler is battle-tested, it now ships FSRS as an option, and the ecosystem around it is unmatched: thousands of shared decks, hundreds of add-ons, and a local API through AnkiConnect that community MCP servers use to let an AI assistant push cards into your decks. It is free on desktop, Android and the web, with a one-time purchase on iOS. The comparison of FSRS and SM-2 explains what that scheduler switch actually changes.

The complaint is always the same and it is fair: the interface looks like software from another era, and the settings are deep enough to intimidate anyone who just wants to learn some words. Anki asks you to learn Anki first. People who get past that tend to stay for years; plenty never get past it.

SuperMemo: the original, and still the most serious

SuperMemo is where all of this started. Piotr Wozniak has been refining the algorithm since the late 1980s, and the current versions go well beyond flashcards into incremental reading, where you feed in articles and gradually convert them into questions over months. For a certain kind of learner it is unmatched in depth.

It is also, by common consent, the hardest to live with. The Windows software is dense and idiosyncratic, the mobile story has never been strong, and the learning curve is steeper than Anki's. Worth knowing about, hard to recommend as a first app.

RemNote: notes and cards in one place

RemNote's pitch is that your notes and your flashcards should be the same document. You write notes in an outliner, mark parts of them as prompts with a bit of syntax, and those become spaced-repetition cards without a separate authoring step. For students working through a textbook or a lecture series, that link between context and card is genuinely valuable.

The trade-off is that it is a note-taking app first. If you are learning a language rather than a subject, you may find yourself maintaining a knowledge base you did not want in order to get the cards you did. There is a free tier and a paid plan above it.

Mochi: the pleasant one

Mochi is what you get when someone takes Anki's job and cares about design. Markdown cards, clean interface, sensible defaults, a decent mobile app, and the scheduling stays out of your way. If Anki's ugliness is the thing stopping you, Mochi is the most direct answer to it.

It is smaller, which cuts both ways: fewer add-ons, a thinner shared-deck library, and a subscription for the full version. Nothing about it is aimed at language learners specifically, so the language features you might expect, audio and sentence handling, are things you build yourself.

Memrise: courses with spacing bolted on

Memrise sits in a different category. It is a course app with spaced review built in rather than a deck you own, and over the last few years it has leaned into video clips of native speakers and AI conversation practice. For a beginner who wants structure handed to them, that is a reasonable place to start.

For anyone past the early stages it gets restrictive fast. You are working through someone else's curriculum, your own words are second-class citizens, and the review scheduling is less transparent than a real SRS. Fine as a supplement, weak as the backbone of a long vocabulary habit.

MindDory: built around the part everyone skips

We build MindDory, so treat this as a stated interest rather than a neutral verdict. The premise is that the scheduling is not the bottleneck any more; capture is. So the app is built so a word you meet anywhere becomes a card in seconds: typed, scanned off a page with the camera, or pulled from an AI chat through MCP, with a memory cue and its sentence generated for you rather than left blank.

Review sessions prioritise the words closest to slipping, it runs on web, iOS and Android, and it is aimed at language learning rather than generic study. What it is not is a general-purpose knowledge system: if you want to revise anatomy or law, Anki or RemNote will serve you better.

The short version

Match the app to the job rather than to the algorithm.

How to choose without wasting a month

Pick one and give it two weeks of daily use before you judge it, because every SRS feels good on day one and only starts to show its character when the review pile arrives. Watch for the moment you meet a word and decide not to bother adding it: that is the app telling you its capture friction is too high, and it predicts abandonment better than any feature list. The rules in how to use flashcards effectively matter more than which of these you choose.

And check the export before you commit. Any app worth using lets you take your cards elsewhere. If you are weighing up the Anki-shaped options specifically, the longer guide to Anki alternatives goes further into each one.